Brugge victory on 20 September, giving manager Maurizio Sarri trust in him for his precise passing and defensive work. On 26 September, Allan scored a goal against defending champions Juventus, with excellent passing and an impressive overall game in a 2–1 home win. On 4 October, Allan would score the opening goal in a 0–4 away rout of Milan in a swift counter-attacking move, where the Brazilian went one-on-one with Milan goalkeeper Diego López. In the 2016–17 season, Allan had 29 Serie A appearances (1 goal, 5 assists), 8 Champions League appearances culminating in an 86.6% pass completion rate, an average of 2.4 successful tackles per game and he also averaged one key pass (one that led to a goalscoring opportunity) per game. In the 2017–18 season, Allan played in all 38 Serie A matches, scoring four goals. During that season, Allan extended his contract with Napoli until 2023. In the following season, he featured in 33 Serie A matches and reached the 2018–19 UEFA Europa League quarter-finals with Napoli. In the 2019–20 season, he played in the 2019–20 UEFA Champions League round of 16 home match against Barcelona, which ended 1–1, then he won the 2019–20 Coppa Italia against Juventus, his only silverware with Napoli. Everton On 5 September 2020, English club Everton signed Allan 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. In March 2022, against Newcastle United, Allan was controversially sent off following a tackle on Allan Saint-Maximin. The Brazilian was also given a three-match ban. Everton later went on to win the game 1–0 due to an Alex Iwobi winner in the 99th minute of stoppage time. Al Wahda On 27 September 2022, Allan signed a two-year deal with Emirati club Al Wahda. International career Under-20 He was called up by Brazilian under-20 coach Ney Franco on 20 August 2011, where he impressed enough at Vasco da Gama