Gabriel Fernández Arenas, known as Gabi, is a Spanish professional footballer who plays as a defensive midfielder. He made 429 La Liga appearances, mostly in two spells at Atlético Madrid interspersed with a period at Zaragoza, winning domestic and European silverware with the former. During his ten-year stint at the club, he amassed competitive totals of 414 matches and ten goals. He also competed professionally in Qatar, with Al Sadd. Gabi represented Spain at youth level.
Gabi was born in Madrid. A product of Atlético Madrid's youth system, he was seldom used during his debut season with the Colchoneros' first team. After a loan to another club in the capital, Getafe CF, he would amass 52 La Liga appearances for the club from 2005 to 2007, scoring his only goal in a 1–1 away draw against RCD Espanyol on 9 April 2006.
Zaragoza
In early February 2007, Gabi joined Real Zaragoza on a €9 million transfer, agreeing to a four-year contract effective as of July. He was an undisputed starter in his first year, but the Aragonese were relegated from the top flight. Defensive-minded Gabi netted four times in 35 games in the 2008–09 campaign, as Zaragoza immediately regained its lost status. In the following season he again was an automatic first-choice, helping his team to a final 14th position. Again a starter in the 2010–11, only missing matches due to suspension, Gabi scored a career-best eleven goals as Zaragoza again escaped relegation, six from penalties – he was also their captain. On 12 March 2011, he scored twice from the spot in a 4–0 home win against Valencia CF; on 30 April, he converted a penalty in a 3–2 victory away to Real Madrid and, on the last matchday, scored twice from open play in a 2–1 win at Levante UD that secured his team's top-flight status.
Atlético return
On 1 July 2011, Gabi returned to Atlético Madrid on a transfer fee of around €3 million. He scored his first goal for the team on 4 December, in a 3–1 home win against Rayo Vallecano – adding one in his own net– and started most of his first season in his second spell, partnering fellow youth graduate Mario Suárez in defensive midfield. Gabi played 45 official matches in the 2012–13 campaign, including seven in the club's victorious run in the Copa del Rey, the first in 17 years. He was also selected by manager Diego Simeone as the new captain. On 17 May 2014, in the away match to FC Barcelona that was the last of the season, Gabi took a 49th-minute corner kick which was headed in by Diego Godín to equalise 1–1, and give Atlético its first league title since 1996. On 4 July, he signed a new contract that kept him at the club until 2017. In the second leg of a domestic cup quarter-final against Barcelona on 28 January 2015, Gabi was sent off in the tunnel at the end of the first half. His midfield partner Suárez was also dismissed later on, in an eventual 2–3 home defeat. On 7 October 2016 the 33-year-old inked a new contract until June 2018, commenting on the deal: "I always say that playing with Atlético de Madrid was my childhood dream, so I cannot ask for more than what I am living these years." Gabi scored his first goal of the season – from 49 appearances – on 16 May 2018, netting from close range after an assist from Koke in the last minute of the Europa League final against Olympique de Marseille, a 3–0 win in Lyon.
Al Sadd
Gabi moved abroad for the first time on 2 July 2018, with the 34-year-old signing a two-year contract at Qatar Stars League club Al Sadd SC. He partnered veteran compatriot Xavi in midfield, and won the league in their first season together. On 15 June 2020, Gabi announced his departure.
Known for his tackling ability as well as his combativeness and hard work, Gabi could both break down opposition attack and dictate play with the ball with equal effectiveness. He was also known to be proficient when in possession, capable of delivering through balls and distributing the ball at both long and short lengths.