Wawrinka, US Open champ Cilic out of Geneva

Stan Wawrinka of Switzerland serves to compatriot Roger Federer during the ATP Tennis Open semi final match on May 16, 2015 in Rome

Top seed Stan Wawrinka and US Open champion Marin Cilic, the second seed, were both knocked out of the Geneva claycourt tournament on Thursday in the quarter-finals. Wawrinka, who was looking to capture a first title on home ground, went down 6-7 (5/7), 6-4, 6-4 to Argentina's Federico Delbonis. Delbonis will next face Portuguese sixth seed Joao Sousa who saved four match points in the third set tie-break to prevail 6-4, 2-6, 7-6 (8/6) over third seed Pablo Andujar. Santiago Giraldo of Colombia booked a spot in his second semi-final of the year when he recorded his first victory over Cilic in their fifth meeting. Giraldo won 7-5, 6-3 and next faces Thomaz Bellucci of Brazil who saved eight of 13 break points in a 6-0, 1-6, 6-3 victory over Albert Ramos-Vinolas.