Mohamed Zidan's third spell with Mainz appears to be coming to an end after contract talks broke down, according to reports in Germany.
The Egypt international returned to the Bundesliga club in January from champions Borussia Dortmund, but an option to extend his contract until 2014 is not being taken up.
Instead, Mainz were proposing a rolling one-year deal for the 30-year-old who has scored 29 goals in 45 appearances for the club, dating back to a loan stay in 2005-06.
But that offer has been rejected and Zidan will leave the club this summer unless he reconsiders.
Mainz's general manager, Christian Heidel, was quoted in Kicker magazine as saying: "Mohamed Zidan has rejected (the contract) and we are not going to negotiate any further.
"The plan did work out in that he made a huge contribution towards us avoiding relegation.
"We have had three fantastic short spells with Zidan, but now it all came down to a long-term collaboration.
"Money was never an issue, it was purely the length of the contract."