Seatwave, the UK-based upstart behind the eponymous marketplace for secondary tickets, has landed $17 million in Series D funding led by Accel Partners with Atlas Venture, Mangrove Capital Partners, Fidelity Ventures and Adinvest joining the round, writes Atlas partner Fred Destin on his blog.

Recently named Europe’s fastest growing digital media company by investment bank GP Bullhound, Seatwave allows fans to trade theatre, sport and music tickets online and thus competes (hard) with TicketMaster (IAC), StubHub (eBay) and that other well-funded startup in the ticket reselling space, Viagogo.

So Viagogo has raised another $15 million and hooked in former tennis champions Andre Agassi and Steffi Graf both as board members / investors as well as advisors to help it push its secondary ticketing market into Europe. The funding now gives it $70 million of external investment. That’s some war-chest.

Agassi and Graf invested in the common-stock round alongside existing shareholders Index Ventures, Bernard Arnault, the chairman of LVMH Moët Hennessy Louis Vuitton SA; German media mogul Herbert Kloiber; and international financier Jacob Rothschild, via his family’s interests. The new funding values Viagogo at more than $300 million, although I hear from sources that they were aiming for a $30 million round.

The company currently serves ticket seekers in the U.S., U.K., France, Germany and the Netherlands. Founder Eric Baker says Viagogo has annual sales close to a $100 million annually and expects those figures to double or triple this year. Viagogo, which charges buyers a 10% fee and sellers a 15% fee on each confirmed transaction, handled $100 million in transactions in 2008.