Celtic welcome Barcelona to Parkhead for their Champions League Group G fixture on Wednesday night, following a 2-1 win for the Catalans in the Nou Camp on Matchday 3.
We look at the key battles at Celtic Park:
FRASER FORSTER v VICTOR VALDES
Both keepers had vastly differing nights when the two sides met in Spain last month. England call-up Forster had an outstanding game as he battled valiantly to keep Barca at bay and was beaten for the winner only in the last seconds of injury time by Jordi Alba. The 24-year-old is likely to be just as busy this time round. Valdes was almost unemployed against the Scottish champions in Barcelona but looked unconvincing at Samaras's goal. He will surely come under more pressure at Celtic Park.
VICTOR WANYAMA v ANDRES INIESTA
Following Wanyama's performance against the Catalan giants Celtic manager Neil Lennon slapped a £25million price tag on his highly-rated midfielder who has been linked with Manchester United, among others. The 21-year-old Kenyan will have the chance to show a massive television audience as well as 60,000 fans just how good he is but will be up against one of the greatest players in the world. Iniesta gave another masterclass of flair and invention against Celtic in the Nou Camp, aside from scoring the equaliser just before the break. Another intriguing midfield battle awaits.
GEORGIOS SAMARAS v DANI ALVES
Samaras gave Celtic a shock lead in the Nou Camp - his fourth of five goals this season which have been scored away in Europe - before he had to come off with an ankle injury. The rejuvenated Greece striker has not played since but Lennon and the Celtic fans will hope to see him back for the return game. Samaras's strong running and pace can be a problem for any defence and it might be down to Dani Alves to try to keep him shackled. However, given the Brazilian's propensity to charge down the right wing, Samaras will be asked to do his share of defensive duties.