Veteran defender Wes Brown says he values every game he plays for Manchester United as he gets older.
The 31-year-old, whose contract is due to expire at the end of next season, has seen his first-team opportunities at United become restricted of late.
Brown is not sure how much time he has left at Old Trafford, and could even make his exit during one of the next two transfer windows.
However the stopper, who is expected to make a Carling Cup quarter-final outing at West Ham on Tuesday evening, insists he will continue to give everything for the Red Devils while manager Sir Alex Ferguson has a place for him.
"I am not getting any younger now and every game I do play I just try to enjoy and do my best for the team," said Brown.
"You have to give everything for the cause. That is the most important thing for me."
Brown has sat out three matches since his involvement in a run of six games from seven earlier in the season, culminating in a scrappy display at Aston Villa this month.
However, the defender is a Carling Cup ever-present this term, and could be handed the captain's armband once again on Tuesday after skippering United to victory over Wolves in the last round.
"It has been great to be back playing some games," he said.
"I am really enjoying things at the moment. I am training hard and hopefully I will have more opportunities in the coming months."
Despite seeing limited action on the pitch this term, Brown knows what is expected of him having experienced hours of repetitive work on the training ground.
"Staying focused is the most important thing when it comes to defending," he added. "We do a lot of repetitive drills in training to help you do that.
"We have this thing called wave games, where we basically attack and defend, over and over again.
"It helps drill it into your head what you need to do in one-on-one situations."