In 2006 the Ukraine striker was signed by Chelsea for £30.8m but in three seasons managed only nine goals in 47 league appearances. Torres has so far played four league games and two in the Champions League and the Spaniard is finding the move from Merseyside difficult.
Shevchenko, now back at Dynamo Kyiv, said: "Torres must keep believing in himself and stay calm because the goals will come. He always works hard on the pitch and maybe he shouldn't think so much about scoring and try too hard to score because, if he relaxes, they will come naturally. Chelsea play football in a different way to Liverpool and he needs time to adapt.
"Everyone expects a lot of him because the price tag was very high. I know what that is like. In England everyone puts a lot of pressure on you when you have cost a lot of money. But he just needs to relax. He has proved he is a top player who can perform and score at the highest levels in the game, so I'm sure the goals will come again."
Shevchenko was back in England this week, playing for Dynamo against Manchester City in the Europa League. He had scored in the home leg and helped them close out the tie against a side whose next league match is at Stamford Bridge. He said: "People have said maybe he will be better next season and it's true he certainly needs time to settle but I hope he can score against [Manchester] City on Sunday and maybe if he does the goals will start to flow this season."
Shevchenko had fitness problems while at Stamford Bridge and Torres has had a similar start there. "I had a hard time at Chelsea mainly because I was injured much of the time," Shevchenko said. "Every time I recovered from one injury I seemed to get a new one and it set me back again. Torres must not let the pressure get to him – the most important thing is to feel good. [But] I didn't leave Chelsea with bad memories though. I enjoyed my time there despite things not going so well on the pitch. I won a couple of trophies while I was there [the FA Cup and League Cup]. Chelsea is a big, ambitious club and I wish them well.
"I still follow Chelsea's fortunes. It's an important game for both clubs on Sunday but I hope Chelsea win, of course."
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