For full match commentary of Porto v Chelsea, keep it talkSPORT from 7pm on Tuesday 29 September.With Chelsea’s dip in form continuing against Newcastle at the weekend, the pressure is still on manager Jose Mourinho.On Tuesday night he returns to his homeland to face Porto, the club he led to Champions League glory in 2004, in the same competition, knowing victory is a must.But the Portuguese giants will be no pushovers as they look to defeat the Premier League champions.They’ve got plenty of stars in their side after a summer of spending, although Jackson Martinez, Danilo and Alex Sandro were sold for big money.So who do Chelsea need to watch out for as they take on Porto at the Estadio do Dragao? talkSPORT takes a look.Click the right arrow above for five stars who could heap misery on Jose Mourinho… 5 5. Yacine Brahimi – The Algerian ace could give Branislav Ivanovic a real scare if hes fit enough to start on Tuesday night. The rapid midfielder has got a bag full of tricks and pace to burn and was a steal of a signing at just 6.5m from Granada in 2014. A knee problem could see Brahimi miss out and Jose Mourinho would breathe a sigh of relief. 5 5 4. Maxi Pereira – The Uruguayan right-back will be the man Eden Hazard tries to evade tonight but Pereira wont let him have an easy ride. Hes tenacious and wont hold back if the Belgian is within tackling distance. Watch out for him going forward too, he hit five goals last season for former side Benfica. 3. Ruben Neves – A talented ball-player, Neves will be trying to make things tick for Porto. Hes just 18 years old but shows incredible maturity and if the Blues dont get to grips with him, he could dictate the game. Dont dismiss him as a plodding defensive midfielder, though, as hes also got plenty of flair. 5 2.Giannelli Imbula – A 20million signing from Marseille in the summer, Imbula is capable of turning defence into attack at the drop of a hat. Hell be looking to break up play and scuttle the ball forward. Hes a capable passer too so the Blues will do well to marshal him. There are reports, however, that Imbula is struggling to adapt, leading torumours of Tottenham and Southampton rekindling their interest. 5 1. Jesus Corona – Spritely winger Corona can play on either flank and is full of trickery and, perhaps more importantly, confidence. The 22-year-old has already netted three times for Porto this season following a move from FC Twente in August and is linking up well with his new team-mates. Nicknamed Tecatito after a beer sold by ex-club Monterreys owners, he could have Jose Mourinho drowning his sorrows by the end of the night.