Barcelona striker Thierry Henry is in contention to feature in El Classico against Real Madrid on Sunday after recovering from a back injury, the club said on their website. The French frontman was sidelined for a month due to the recurring back problem. He has returned to full training on Wednesday, to the delight of Barca boss Frank Rijkaard. The Dutch tactician will miss the services of Argentinean prodigy Lionel Messi in the crucial game due to injury. Barcelona will hoping to close the gap on leaders Real as they trail their arch-rivals by four points.