Matip won the Premier League and UEFA Champions League with Liverpool.
Liverpool vs Ajax: Joel Matip scored the winner in the 89th minute as Liverpool beat Ajax 2-1 to register their first Champions League win this season.
Jurgen Klopp rated Liverpool's chances of winning the Premier League as "not likely but possible" after the under-strength quadruple chasers took the title race to the final day of the season with a 2-1 win against Southampton on Tuesday
Liverpool are still "chasing like mad" after Manchester City at the top of the Premier League, said Jurgen Klopp after coming from a goal down to beat Aston Villa 2-1 on Tuesday
League Cup Final: Liverpool scored all 11 of their penalties but Chelsea goalkeeper Kepa Arrizabalaga, who came on as substitute for the shootout, failed to convert his spot-kick.
Joel Matip was injured during Liverpool's goalless draw with Everton at Goodison Park on June 21.
Joel Matip has made 107 appearances for Liverpool, including last season's Champions League final win over Tottenham in Madrid.
Manchester City fired the first shot in their battle for supremacy with rivals Liverpool as they snatched the Community Shield with a 5-4 penalty shoot-out win.
Schalke 04 drew level with German league leaders Bayern Munich after a 3-1 win over Stuttgart on Saturday following the Bavarian giants' shock defeat at Borussia Moenchengladbach.