Champions League Group H: Barcelona v Celtic Champions League Group H Venue: Nou Camp, Barcelona Date: Wedneday 11 December Coverage: BBC Sport website, BBC Radio Scotland Spain midfielders Xavi and Andres Iniesta have returned to training with Barcelona ahead of Celtic's visit to the Nou Camp. The Champions League Group H leaders are definitely without forward Lionel Messi, goalkeeper Victor Valdes and midfielder Cesc Fabregas. Celtic winger James Forrest and defender Adam Matthews could return to action following injury. Striker Georgios Samaras and midfielder Nir Biton should recover from illness. It would leave Celtic manager Neil Lennon with a virtually full squad from which to choose, with long-term injury victim Steven Mouyokolo as the only absentee. Brown is available after the three-match ban that followed a red card against Barcelona Captain Scott Brown is also available for selection after the midfielder completed his three-match European ban, the result of a red card issued during Barcelona's 1-0 win in Glasgow. Wales international Matthews has not played since 5 October, while Scotland wide-man Forrest has missed Celtic's 7-0 hammering of Hearts and their 5-0 demolition of Motherwell. Israel midfielder Biton and Greece forward Samaras missed Friday's match at Fir Park with a virus. Celtic are guaranteed to finish bottom of Group H, but Barcelona need a point to guarantee qualifying for the last 16 as group winners. The Spanish champions come into the game on the back of a 4-1 win over Cartegena in the Copa del Rey. Fabregas scored one of the Barca goals and provided the winner when they defeated Celtic in Glasgow in September, but misses out this time through suspension. That could increase the chances of a return for Xavi, who has had a calf problem, and Iniesta, who has recovered from a hamstring injury, who have now been cleared by the club's medical staff to return to training. Barcelona could welcome back World Cup, European Championship and Champions League winning midfielders Xavi and Andres Iniesta for the final group match against Celtic on Wednesday. Spain full-back Jordi Alba played 80 minutes of the Spanish Cup game against Cartagena on his return from hamstring and thigh injuries. However, Messi and Valdes remain absent through injury. Should Celtic win in Barcelona and AC Milan defeat Ajax at the San Siro, the Italians will take over at the top of Group H.