VfB Stuttgart sporting director Sven Mislintat admits the form of Dino Mavropanos is creating a dilemma.

On-loan from Arsenal this season, the young Greek defender has made impressive progress with the Bundesliga strugglers and is now proving one of the team's outstanding performers.

Mislintat is eager to extend Mavropanos' stay into next season, but admits the better he plays, the less chance of VfB keeping him.

"The better Dino plays, the less likely it is to be able to loan him again," he said.

Mavropanos' loan does not carry a permanent option.