Manchester United Champions League winner Edwin van der Sar expects David De Gea to maintain his No1 status this season.
De Gea faces fresh competition from Dean Henderson.
But Ajax chief Van der Sar told MUTV Group Chat: “Of course David has been fantastic.
"The moment he took over [from me] he has the Player of the Year [Award] many times and he's been amazing for the club.
“Ole [Gunnar Solskjaer] will take a look at how the competition in the team is and which goalkeeper works best with the defence.
“To be fair, I was quite impressed with Dean's rise with Sheffield, but David has been great for United. He has made some mistakes but I've made them myself also, every player makes mistakes.
“It's about the moment in which you make them – are they at 0-0? Is your team bailing you out? Could a striker score an injury-time goal so the mistake you made goes into the background?
“I'm sure that David will be the force that he has been for the club and hopefully now with the investment in the right players that are coming in, it's looking more and more like a competitive squad again to challenge for the honours."
Van der Sar believes that the competition will benefit both goalkeepers as they will continue to make each other better.
"I'm sure that those two will push each other to a high level," Van der Sar added on competition for places. "That's what it's always been about.
“When you're a young player, you look up to the guys who are in the first team. Then when you start training [with them] you start to challenge and start to work hard so you're ready when that moment comes.
“When you get that chance you need to grab it. Some boys are lucky in that you might win, score or give an assist, or you might be unfortunate and lose a game and then the manager might think it's difficult to bring you in another time."
