Watford goalkeeper Ben Foster believes he could keep playing until he is 40 years of age. 

The veteran keeper turns 36 in April, but has been in fine form so far this season and after yet another impressive performance against Brighton, the former England international said he has a few more seasons in him yet and has learnt how to keep himself fit from former Manchester United team-mate Edwin Van der Sar.

He said: "I can carry on for as long as I want. I feel brilliant. 

"I have always said about my knees, but touch wood they have been brilliant lately and so two, three, four more years. 
"I'm trying to get to that 40 year mark. I'm training most of the time and I'm enjoying it.

"I was with Van der Sar at United and when he actually signed for them I think he was 35 and he learnt how to look after himself properly and he knew how to make himself fit for the Saturday.

"I watched him go year after year after year and actually when he retired he could have gone for another two or three years, I think he just got bored in the end. He was too good and I learnt a lot from him."

Speaking about the match, Foster was delighted with his own display amid a team performance that was overall disappointing. 
One save in particular stood out for the keeper, in which he improvised a smart save with his feet to deny Shane Duffy a spectacular finish from an overhead kick.

He said: "I don't even know how I did it, I was buzzing with that save more than anything cause it kind of bounced and bobbled around and I just stuck a foot out, I didn't even think about it to be honest. They're the saves you enjoy more cause they're a bit more off the cuff.

"We knew it would be tough, Brighton have kind of turned their season around. 

"You come to the Amex, you know the two centre backs are going to cause you a lot of problems from set pieces and not only that they kind of nullified our attack as well cause every time we went long you knew it was going to fall on their heads, so we found it tough today and we will be a little bit disappointed with the performance but we're definitely happier than they are with the point."