Ukraine striker Andriy Shevchenko admits he is unsure if he will earn a permanent return to AC Milan at the end of the season.The 32-year-old is currently on a season-long loan at Milan from Chelsea after a disappointing spell in West London.Shevchenko has struggled to establish himself in Carlo Ancelotti's plans this season, but he is keen to stay with the Rossoneri."The truth is that I may not be given the chance to stay at Milan," Shevchenko told Gazzetta dello Sport."I know that it has been a difficult season, but I would love to stay put."I will keep trying as hard as I can to prove that I can still do good things for this club."At least I am getting a chance to play some games now and that makes everything easier."It has been disappointing not to get more playing time, but that's just the way it is at a club like Milan."