London - Viagogo, the operator of an online secondary ticket exchange in Europe, announced that it has raised $15 million in its fourth round of funding, from investors including tennis stars Andre Agassi and Steffi Graf, and return backer Index Ventures.

Also participating were individual investors Herbert Kloiber, Jacob Rothschild and LVMH chairman Bernard Arnault.

The U.K.-based company was founded by the creator of U.S. ticket marketplace StubHub, which sold to eBay in 2007 for $307 million.

The company recently secured ticketing deals with Andrew Lloyd Webber's Really Useful Group, and Madonna's Sticky & Sweet Tour.

Viagogo has now raised a total of $70 million; the company will use the new funds to support global expansion.

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