Diego Ribas da Cunha (born 28 February 1985), commonly known as just Diego or Diego Ribas, is a Brazilian former professional footballer who played as an attacking midfielder. A full international for Brazil since 2003, Diego earned 34 caps and scored four international goals. He was part of the Brazilian squads which finished as runners-up at the 2003 CONCACAF Gold Cup, won the Copa América in 2004 and 2007, and earned a bronze medal at the 2008 Olympics.
Diego began his career at Santos, where he won two Campeonato Brasileiro Série A titles before moving to Porto in 2004. Despite winning further trophies in Portugal, his personal form dropped. After two seasons, he moved for €6 million to Werder Bremen where his form improved, winning domestic honours and helping them to the 2009 UEFA Cup Final. He also won honours at Atlético Madrid, including the UEFA Europa League in 2012. From 2016 to 2022, he played for Brazilian club Flamengo, with whom he won the Copa Libertadores among other domestic and international honours.
At age six, Diego started to show his talent when training with Comercial FC in Ribeirão Preto. After joining another team, São Carlos, when he was nine, Diego decided to take trials in the hope of impressing a bigger club. Diego was first signed by the São Paulo team Santos at the age of 12. He developed while in the Santos youth system, making his first team debut at the age of 16 in the Rio-São Paulo Championship in 2002 and in the same year won the domestic Campeonato Brasileiro championship. He, Robinho, Elano and Alex were known as a famous group when they played for Santos.
Diego was then signed by Primeira Liga club Porto in July 2004 as a replacement and the potential successor for Deco, but he could not produce the same calibre of performances as he did at Santos. Diego made his debut for Porto in a 1–1 draw against União de Leiria on 22 August and on 30 October, he scored his first goal for Porto in a 2–2 draw against Nacional. As Porto triumphed in the Intercontinental Cup against Once Caldas via a penalty shootout, Diego was sent off for swearing at goalkeeper Juan Carlos Henao after scoring his effort. Journalist Tim Vickery ascribed this action to Diego's experiences against the team in the previous season's Copa Libertadores, in which the physical Colombian side eliminated Santos in the quarter-finals. In his first season at Porto, Diego made 30 appearances, scoring two goals against Sporting CP and Braga. In 2005–06, however, he did not maintain a stable place in the Porto team under coach Co Adriaanse and also found life difficult at Porto. He eventually left the club to sign with Werder Bremen.
In May 2006, Diego signed a contract with German Bundesliga side Werder Bremen until 2010 for a transfer fee of €6 million. His first match for Bremen came in the DFB-Ligapokal. Werder Bremen won the cup, beating Bayern Munich in the final on 5 August. The 2006–07 Bundesliga season began well for Diego. He scored the first goal and set up two more for Bremen in their 4–2 win over Hannover 96, on 13 August. In his second match in the Bundesliga, he set up both goals in the 2–1 win over Bayer Leverkusen.
Thanks to his good performances in August, both in the Bundesliga and in the Ligapokal, Diego won the August Player of the Month award. As the Bundesliga season progressed, Diego made several amazing performances and became one of the most valuable players for Bremen, along with his teammate Torsten Frings. Together, they were called the "two motors of Bremen's midfield". In October 2006, he won a second Player of the Month award, as well as again in December 2006. He was then named as the Best Player of the first half of the Bundesliga season.
Werder Bremen finished in third place in Group A in the Champions League group stages, and they moved to the UEFA Cup, where they reached the semi-finals after beating AZ in the quarter-finals due in part to Diego's creative play. On 15 April, Diego again played well, scoring in the 2–0 win over Borussia Dortmund. Five days later, on 20 April, Bremen played against Alemannia Aachen. Although Diego's performance was good, he did not score until stoppage time when he scored from 62.5 metres, which later was elected as goal of the year. Bremen won the game 3–1 and topped the table with 60 points.
Following his good performances in the first half of the Bundesliga, Diego got called up to the Brazil national team in November. After the 2006–07 season ended, Diego won the Bundesliga Player of the Season award organised by popular magazine kicker. He received just over 50 percent of the votes. Unfortunately, his team did not win the Bundesliga after finishing third in the table, behind champions VfB Stuttgart and Schalke 04.
Diego started his season well, scoring a penalty on the first matchday. Diego gave many outstanding performances. He was crucial as Bremen progressed to the 2007–08 Champions League group stage. They beat Croatian club Dinamo Zagreb 3–2 in Zagreb, with Diego scoring two penalties. On the first Champions League group stage matchday, Bremen lost 2–1 to Real Madrid, but Diego's performance aroused interest in Real Madrid's coach Bernd Schuster. Rumours of his departure, however, were put to an end when Diego signed a new contract which would last until 2011.
After the loss to Real Madrid, Bremen faced VfB Stuttgart, the defending German champions, at home. Werder won 4–1, with Diego leading the midfield. Later on in the season, Bremen achieved a historical 8–1 win over Arminia Bielefeld, with Diego assisting three goals and scoring one himself. Diego was voted Player of the Month in September. He then scored two goals en route to the UEFA Cup round of 16 with Bremen, where they lost to Rangers.
Diego's last season with Bremen was his most successful. He scored 20 goals in total (more than his two first seasons in the club), although Bremen did finish just tenth in the 2008–09 Bundesliga and were knocked out of the Champions League at the group stage after finishing third in their group. In the UEFA Cup that season, Diego scored six goals, all in the knockout stages. He also scored against Milan in the round of 32, equalizing after 84 minutes, and assisting Claudio Pizarro in the second leg's only goal. He helped his team through the round of 16, and scored four of the six goals, and managed one assist in the quarter-final knockout of Udinese.
In the semi-finals, after losing 1–0 in their hometown to "North Derby" rivals Hamburger SV, Diego helped his team back in the second leg with an early equalizer to Ivica Olić's early critical goal. Later on that game, he assisted a corner to Frank Baumann's third Bremen goal. In that game, Diego received an unfortunate yellow card, preventing him from playing in the final, and with a 3–2 away win, he ended his UEFA Cup participation, leading Bremen to their first UEFA Cup final ever. Without Diego in the 2009 UEFA Cup Final, Bremen lost the game 2–1 in extra time to Ukrainian team Shakhtar Donetsk. In his last match with Bremen, Diego gave the assist to Mesut Özil's winning goal against Bayer Leverkusen in the DFB-Pokal final to secure Bremen's sixth title in the competition.
On 26 May 2009, Diego signed a five-year contract to join Juventus of Serie A at the end of the season 2008–09 season. The fee paid to Bremen by Juventus was worth €24.5 million, though the price can rise by a further €2.5 million in case of the fulfillment of established sports objectives in the next five years. Diego made his Juventus debut against the Korean side Seongnam, a game they won 3–0. In the first half, Diego made the pass to Mauro Camoranesi, whose pass followed up to a goal. Diego then scored in the second half and was subbed out at the 60th minute. On his Serie A debut, he assisted Vincenzo Iaquinta's goal from a set-piece. In the second fixture of the campaign, Diego recorded his first Serie A goal, scoring twice in Juventus' 3–1 victory against Roma on 30 August 2009. He also scored goals against Bologna, Fiorentina and Napoli. One of his most noted assists was his backheel to Alessandro Del Piero's goal against Genoa. He has also scored in the 2010 TIM Trophy against Milan.