Chelsea attacker Salomon Kalou knows his clash with Tottenham star Gareth Bale could be decisive in their match this weekend.
Some will say the Tottenham player can provide a different test running from deeper and Kalou weighs up what his own job might be on Saturday.
"If he [Bale] does go to left-back and attacks a lot then there is a space behind him," Kalou told chelseafc.com. "It is hard to do both, the way you attack is not the way you defend, and I think he is more a left winger than he is a left back now as he hasn't been playing that position for a while.
"It is going to be a great game,' the Ivorian adds. 'Tottenham are a good team with some great players and it is a London derby. It is a fight all the way along to the end of the season now and we can pull off a good game. We must focus on our own game because it is very important to keep Manchester United under pressure until Sunday when they play their own big game against Arsenal. Everything is possible in football and we have to believe that."
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