Former defender Alain Roche says the French champions must assess whether the veteran striker is worth keeping until the summer of 2016

Paris Saint-Germain may have to decide to pay Zlatan Ibrahimovic to leave the club, according to former defender Alain Roche.

The Sweden star has inspired PSG to three Ligue 1 titles since joining the club in 2012 and could complete a clean sweep of domestic silverware this season.

The 33-year-old's contract is set to expire next summer and former employers AC Milan have been linked with a possible move, even though his agent says such a transfer would be almost impossible.

Roche, however, thinks the club must assess whether Ibrahimovic can offer the same level of excellence next season or if he should be moved on this summer.

"Zlatan Ibrahimovic? It's a question of choice. If the club considers it to be more of an advantage than a disadvantage, then they have the means to pay him to leave," he was quoted as saying by Le 10 Sport.

"Ibra, he's [worth] 20 to 30 goals in the championship, provided he understands that he can't do everything."