The championship will feature eight of the world's top 12 players: Rafael Nadal, Novak Djokovic, Andy Murray, Juan Martin Del Potro, Andy Roddick, Fernando Verdasco, Jo Wilfried Tsonga and Marin Cilic.

BBC: Mario Ancic given wildcard for Queen's Club

The other semi-final will see Fernando Verdasco of Spain, the number six seed, take on Marin Cilic after the Croat qualifier overcame Latvia's Ernests Gulbis 6-4 6-4.

BBC: Murray fights back to reach semis

Other seeds such as Tommy Haas, Fernando Verdasco, David Ferrer, Lleyton Hewitt, Gael Monfils and Marin Cilic also progressed along with former tournament runners-up Jo-Wilfried Tsonga, Marcos Baghdatis and Rainer Schuettler, but former world No. 7 Richard Gasquet was eliminated.

CNN: Federer survives early Melbourne scare

He will now play Marin Cilic in the last eight after the Croatian beat Spain's Fernando Verdasco 4-6 6-1 6-4.

CNN: STORY HIGHLIGHTS