Black Stars midfielder Michael Essien has told Barcelona that Chelsea will be just as tough in next week's Champions League semi-final return.Barca stars Xavi and Andres Iniesta complained of being kicked during Tuesday's 0-0 Nou Camp draw.But Blues midfielder Essien declared:"In modern football you need to be strong."That is the way we play. Any time we tackled them they seemed to fall over."Xavi, who captained the Catalan club against Chelsea, said: "In England they talk about fair play so much. It's a shame that they don't put that into practice out on the pitch."There was no fair play from Chelsea at all. We played football; they did not play anything at all. The [Michael] Ballack challenge was a blatant red card but the referee did nothing. We had them holed-up in their own penalty area for the whole game."Source: the sun