Tony Adams fears that former Arsenal and Chelsea midfielder Lassana Diarra could leave Portsmouth this summer despite the club's FA Cup Final success.
The 23-year-old, who played a key role in Pompey's victory against Cardiff City on Saturday, has only been at Fratton Park since January, but assistant manager Adams thinks he may be on the move again before the start of next season.
"Portsmouth needs to come up to his standards," said Adams.
"Can the club do that? Only if the chairman keeps putting money in."
However, chief executive Peter Storrie has promised the squad will be strengthened, saying: "We're not going to stand still. It's our job to go on and win more.
"We're going to bring in more players during the summer, strengthen the team and get better and better.
"We want to retain the FA Cup for a start and, obviously, do better than we did this year in the league. We had a great season, finishing eighth, but maybe we can go up a couple more places next year.
"Being in next season's UEFA Cup doesn't really change the thinking. We'll look at it in terms of squad size. We'll be looking to bring more quality players in and widen the squad as well."