Atletico Madrid midfielder Saul Niguez rounded off an excellent breakthrough season by extending his contract with the Champions League finalists to 2021, the club confirmed on Wednesday.

"I am very happy to continue defending this shirt," said Niguez, 21, who famously scored a wonderful solo goal against Bayern Munich in the semi-finals to help lead Atletico to their second Champions League final in three years.

That strike was one of nine goals in 47 appearances in all competitions this season.

And Niguez's fine form was also rewarded with a call-up to Vicente del Bosque's provisional 25-man Spain squad for Euro 2016 on Tuesday despite being uncapped at full international level.

The new deal only extends Niguez's contract by one year, but a significant wage rise is hoped to ward off interest from Premier League clubs with Manchester United and Tottenham Hotspur reportedly interested.

"We are all very happy with the agreement reached with Saul," said Atletico sporting director Jose Luis Caminero.