Manchester United midfielder Ander Herrera says he will fight for his long-term future at the club, calling the Red Devils the "biggest club in England".
The 27-year-old has become a regular starter for Jose Mourinho's team this season but admits that his time at Old Trafford is never certain and he needs to work hard to secure his long-term future.
Asked if he wants to remain at the club, Herrera told Inside United: "Yes, but you never know because if I want to keep playing for United you have to play very well because United is the biggest club in England.
"The club has the capacity to bring any players here so you have to always be at your highest level if you want to keep playing for this club. It's not easy but I hope I can and I will fight for it."
— Ander Herrera (@AnderHerrera) December 17, 2016
The former Athletic Bilbao player, who has formed a potent midfield trio with Paul Pogba and Michael Carrick as United have gone unbeaten in their last six matches, also said that their not to much difference between the Premier League and the top flight in his home country.
Herrera, who also made his debut for Spain in November and is now in his third season in England, said: Everyone always asks me that about the differences and to be honest I don't think there is a big difference, football is football everywhere and the good players are good players everywhere.
"Maybe the rhythm of the game here is a little bit higher sometimes. In Spain and other countries they think more about tactics or defending the goal, but here in England everyone wants to attack and that's good for the fans as well."