Allan Marques Loureiro, commonly known as Allan Marques, or simply Allan, is a Brazilian footballer who plays as a defensive midfielder for Premier League club Everton and the Brazil national team.
After starting out in the Madureira youth system in his home country, he joined Uruguayan club Deportivo Maldonado, but later returned to Brazil and made his professional debut with Vasco da Gama in 2009. Allan joined Italian club Udinese in 2012, and subsequently moved to fellow Serie A side Napoli in 2015.
At international level, he was a part of the Brazil under-20 side that won the 2011 FIFA U-20 World Cup, and later made his senior debut for Brazil in 2018; he was a member of the team that won the 2019 Copa América on home soil.
English club Everton signed Allan on 5 September 2020, for around £21.7m on a three-year deal, to be reunited with former Napoli manager Carlo Ancelotti. He made his debut the following week in a 1–0 win away to Tottenham Hotspur.
Allan suffered an injury to his hamstring on 16 December during an away game against Leicester City, he was replaced in the 41st minute by Andre Gomes; Everton won the game 0–2. Allan was ruled out for the remainder of Everton's games in 2020. He returned to the starting eleven on 1 March against Southampton playing the full 90 minutes, Everton won the game 1-0.