Bundesliga champions Borussia Dortmund have snapped up Australian teenager Mustafa Amini from the Central Coast Mariners. The 18-year-old has been linked with a move to Europe for several months, with Celtic said to have been battling Dortmund for his signature. But the German club have won out, signing Amini for an undisclosed fee believed to be worth well in excess of $135,000AUD (£90,000). Amini will remain with the Mariners on a 12-month loan deal, allowing him to represent Australia at FIFA U-20 World Cup Colombia 2011 before returning to Australia to play in the forthcoming A-League season. \"I\'d like to thank Peter Turnbull and Graham Arnold at the Mariners for working on this with Dortmund,\" Amini said. \"I\'m really excited to be joining Dortmund, they\'re a big club with amazing supporters. It would be amazing (to play for Dortmund) but first of all I want to have another great season with the Mariners, as well as a good U-20 World Cup in Colombia.\"