Commonwealth heavyweight champion Matt Skelton is backing Audley Harrison to beat Michael Sprott - but has warned his big British rival he's still number one. Harrison tackles Sprott tomorrow night at Wembley Arena, with the English and EU heavyweight titles on the line. And with the winner pencilled in to fight Skelton in May, the Bedford Bear will be ringside to make sure his rivals don't steal a march on him. "I hold the Commonwealth title and only vacated the British title so I could fight Danny Williams," said Skelton. "I never lost it in the ring. At one stage there were three names in the running to be number one in Britain, me, Audley and Danny, but with Danny's loss, I think it's down to two. Obviously, if you ask me, I'll say I'm number one, but I'm sure Audley thinks the same. I'd just like the opportunity to prove myself and the winner can go on and fight for a world title later this year. It's all up for grabs." Skelton was recently give the all clear to resume training after he was forced to pull out of a December fight with Harrison because of a hand injury