Explosive forward Alexis proved his undoubted worth to Arsenal again last season.
The Chile international followed up his highly impressive debut season with the Gunners by continuing to terrorise defences, both in the Premier League and on the continent.
The all-action, energetic front man, who can play wide or in a more central attacking position, claimed his first hat-trick for the club during the 5-2 win at Leicester in September. It made him the first player to score trebles in each of the top leagues in England, Spain and Italy.
A hamstring injury ruled him out of action for two months during the winter, but he returned to goalscoring form during the run-in, netting five times in four games in April.
Alexis (full name Alexis Alejandro Sanchez Sanchez, but known by his first name) ended the season closing in on 100 first-team appearances, having been an instant success after joining from Barcelona following the 2014 World Cup.
He concluded his first season at Arsenal with a screamer in the FA Cup final, was named in the PFA Team of the Year and was named PFA Fans' Player of the Season.
During three seasons in Spain, Alexis won the FIFA Club World Cup and UEFA Super Cup (2011), the Copa del Rey (2012) and the league title (2013).
Previously he spent five years with Udinese in Serie A, which included loan spells with Colo-Colo and River Plate, having started his career with Cobreloa in Chile.
A full Chile international since 2006, he scored the winning penalty as his country won the Copa America in 2015, and was ever present as they retained the trophy last summer. He earned his 100th cap during the tournament, where he scored three times in six games.