Claasen has been outstanding for Lierse since joining them ahead of the 2010/11 Jupiler season and has drawn interest from top sides in Belgium and across the continent. His business manager, Rob Moore, says Lierse are likely to cash in on the player either now or at the end of the current season with his contract due to expire in 2013. "If he does not move this transfer window to a top club in Belgium, then this will in all likelihood then be his last season in Belgium," Moore says. "Next July he will only have 12 months left at Lierse and will probably then transfer to a club outside of Belgium." Claasen was one of the outstanding players in Bafana Bafana’s 3-0 friendly international victory over Burkina Faso recently having been drafted in after an injury to skipper Steven Pienaar, and has retained his place in the squad for the 2012 Africa Cup of Nations trip to Niger this coming weekend. Moore says the maturity shown by the 21-year-old in recent weeks should stand him in good stead should he be selected in Niamey. "Claasen was runner-up as the Lierse Player of the Year last season and has started 2011/12 exactly where he ended off last season – playing very well and moving onto a different level as a player. There is a greater maturity in his game and by playing in a team that has to battle for each and every point it earns, he is learning to take on more responsibility," Moore says. "It's easier to fit in and look good when you come into a team that dominates every game – but when the team is battling away, as a player, you either can't handle that and then fall by the wayside, or you take the bull by the horns and develop greater character traits. Claasen has displayed the latter. "I see a lot of potential with Claasen - I believe that if he can add goals to his game, he has all the attributes to reach a top level."