Fernando Torres is concerned his health is at risk by playing for Liverpool in the Premier League and fears he could be injured for life if he stays in England.
All the recent speculation has seen the Reds' star striker being linked with £60million move to Manchester City in the summer.
But the former Atletico Madrid marksman has hinted he will leave the British Isles if he does say goodbye to Anfield.
"The Premier League is such a tough competition and I have always admired this championship and the players who are here," Torres, whose season has been scuppered by a knee injury which could see him miss the start of the World Cup with Spain, told The News Of The World.
"This is my third season and I'm still amazed to see (Steven) Gerrard, (Wayne) Rooney and (Frank) Lampard, players who have been here a long time, still playing at such a high level and with such impressive rhythm because the English league really wears down a player.
"I just can't imagine what state I'll be in within five or six years if I continue to play here - it could easily give me problems when I stop playing. The physical level is superior to all other countries."
Torres has admitted that he would not have come to England had it not been for Liverpool boss Rafa Benitez, who has the right managerial approach for the 26-year-old to improve his game.
"If I score twice in a game I want to hear that I played badly to help me do even better next time," he added.
"Rafa is ruthless and sometimes it is tiring but he knows the right way to deal with me.
"I have put in a lot of effort but you always need someone who brings the best out in you, someone who is very demanding.
"If Rafa had not been here I would never have come. He has taught me a lot and he has helped me go beyond my limits and to be the player I am today."