MADRID, Spain, April 29 : World number one Jannik Sinner held off 19-year-old wildcard Rafael Jodar to win 6-2 7-6(0) in the Madrid Open quarter-finals on Wednesday, becoming the sixth player to reach the semi-finals of all nine ATP 1000 Masters tournaments. Sinner saved five break points in the second set and won 11 points in a row to secure victory over the Spaniard. "He pushed me to the limit, he's an incredible player... I'm incredibly happy, it's been a very high quality match," Sinner