Earlier Richard Krajicek had survived a nailbiting test against Radek Stepanek to reach the quarter-finals.

BBC: El Aynaoui falls in Milan

Serbia's 2008 French Open champion will next play Dutch world No. 91 Michaella Krajicek.

CNN: STORY HIGHLIGHTS

The big-serving Croatian beat ninth seed Richard Krajicek in a marathon match, eventually taking the final set 15-13.

BBC: Sampras ends Henman hopes

Krajicek wasted five match points but finally came through 15-13 in a third-set tiebreak to win 3-6 6-3 7-6.

BBC: El Aynaoui falls in Milan

Richard Krajicek lost to Roger Federer at the Ordina Open in his first match after a 20-month absence through injury.

BBC: Krajicek beaten on comeback

Krajicek will meet Jarrko Nieminen in the last eight after the Finn beat Anthony Dupuis of France 7-6 2-6 6-4.

BBC: El Aynaoui falls in Milan

Former Wimbledon champion Richard Krajicek also advanced to the second round with a 7-6 6-4 victory over Australian Scott Draper .

BBC: Costa crashes out

Dutch player Krajicek, half-sister of 1996 men's singles champion Richard, finally came through 7-6 (10-8) 6-7 (5-7) 6-2 against the Russian.

BBC: SPORT | Tennis | Jankovic survives Safarova battle

There was a shock on Court 13, where 31st seed Michaella Krajicek, who thrashed Britain's Katie O'Brien in the previous round, beat eighth seed Anna Chakvetadze in a marathon three-set battle.

BBC: SPORT | Tennis | Jankovic survives Safarova battle

The ATP Champions Tour roster now reads like a who's who of tennis with former grand slam all-time record holder Pete Sampras a recent addition, plus the likes of Goran Ivanisevic, Stefan Edberg, Richard Krajicek and Open Court's own Pat Cash.

CNN: Past Masters still court glory on Champions Tour