Juventus' German midfielder Sami Khedira has signed a contract extension until 2021, the Serie A champion announced on Wednesday.

Since joining Juventus in 2015 on a transfer from Real Madrid, Khedira has become one of the squad's cornerstones, helping the Italian team win three Serie A titles, three Cups and an Italian Super Cup.

"The German midfielder puts pen to paper on a new two-year deal with Juventus," the Italian club said in a statement on its official Web site.

Khedira, who was part of the Die Mannschaft squad that won the 2014 FIFA World Cup, is the midfielder that got the most playing time with Juventus over the last three years, in the process collecting a total of 20 goals and 14 assists.

The 31-year-old, who won the UEFA Champions League with Real Madrid in 2014, was a starter in Juve's first three 2018/2019 Serie A matches and scored once in his team's 3-2 win over Chievo on Aug. 18.