Fabio Capello says a Premiership winner from this season's Champions League can lift England's World Cup chances.
Manchester United, Chelsea and Arsenal are all still alive in the competition.
Talking about English teams reaching the Champions League Final, Capello said: "Whoever wins in Europe will arrive at this important tournament with an extra energy.
"We go there to win. I don't agree with those who suggest that if English clubs progress in the Champions League that fatigue could have a negative impact on England in South Africa.
"Remember that the psychological component is important.''