Guus Hiddink has put the nation on goal alert after predicting Chelsea and Barcelona could serve up another feast of football at the Nou Camp.Chelsea and Liverpool produced one of the most exhilarating matches seen in the Champions League when they drew 4-4 in the quarter-final, second-leg at Stamford Bridge a fortnight ago.Chelsea secured their semi-final spot 7-5 on aggregate after fighting back from two goals down at the interval and Hiddink hinted there could be more exciting times ahead against Barca in Tuesday's semi-final first-leg."I think both teams have a style to attack when they can," declared Hiddink. "Barcelona like to attack and Chelsea are not a team who have the strategy to sit back and wait until it happens."The team have shown a lot of initiatives and that's why I think it is more or less an open clash, with two teams who like to go forward."After their 4-4 draw with Liverpool, Hiddink knows his side cannot afford to start in a sluggish fashion against Barcelona.He continued: "It is the whole squad's responsibility to make sure we have a concentrated start tonight."I have seen Barcelona play many times in the last weeks and also before."For a long time I have been a Barcelona admirer and an admirer of their philosophy."The players not only play for themselves but also a great club and they know it, in a side which is very attacking and attractive - it makes it typical of the Barca style."Lionel Messi, Samuel Eto'o and Thierry Henry have scored 90 goals between them in all competitions this season.However, Argentina international Messi is perceived as the biggest threat with 21 goals to his name so far this season.The subject of how to stop the winger has dominated the pre-match build-up following the suspension of England left-back Ashley Cole.It has left Chelsea without a recognised replacement following the sale of Wayne Bridge to Manchester City in January and an untimely knee ligament injury to Paulo Ferreira.The answer for the Dutchman is to place his faith in Portugal international Jose Bosingwa, and Hiddink remains confident the full-back's vast European and international experience will be the key to success.Normally a right-back, Bosingwa switched to the other flank in the Barclays Premier League win over West Ham on Saturday but Messi is certain to provide him with more problems than Luis Boa Morte did at Upton Park.Hiddink added: "Messi had big promise and, within a short period, he has made it happen completely."I like very much the way he plays, he does like the stardom of playing and it's very effective. It looks very simple but it is very difficult."But I have full confidence that Bosingwa can do the job tonight."