Sergio Romero has signed a new long-term deal at Manchester United.
The Argentina international goalkeeper was set to be out of contract next summer, but will now stay until at least 2021. He helped United win the Europa League last season, starting both legs of the semifinal against Celta Vigo and the final against Ajax in Stockholm.
He is set to compete with David De Gea and youngster Joel Pereira next season.
De Gea has again been linked with a move to Real Madrid, two years after his proposed move to the Bernabeu collapsed at the last minute.
Romero said: "I am delighted to have signed a new contract. Who wouldn't want to be at the biggest club in the world?
"We have great goalkeepers here and we are always learning from each other. Of course, it was a very proud moment for me and my family to be part of the Europa League final, and I am looking forward to helping the team build on last season's success in 2017-18."
Mourinho added: "Sergio is a great goalkeeper and professional. He had a good season and outstanding performances, especially in our Europa League success. Sergio deserves his contract, and for Manchester United to have Sergio and David is amazing in such an important role."
Romero will get his first action of preseason against Real Salt Lake on Monday evening in Utah.
Argentina's No. 1 was reduced to a watching brief as United's preseason tour kicked off with a 5-2 win at the Los Angeles Galaxy but has been promised a half in their second match.
"In the second match, David does not play,'' Mourinho said earlier in the week.
"We play the kid [Joel Pereira] for 45 and Romero for 45. The third match against Man City, we don't play Joel. We will play David for 45 and Romero for 45.''
Information from Press Association Sport was used in this report.