Italy's Jannik Sinner applauds fans after beating Norway's Casper Ruud, at the end of their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Italy's Jannik Sinner, left, greets Norway's Casper Ruud, at the end of their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Italy's Jannik Sinner reacts after winning a point to Norway's Casper Ruud, during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Norway's Casper Ruud returns the ball to Italy's Jannik Sinner during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Italy's Jannik Sinner returns the ball to Norway's Casper Ruud, during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Norway's Casper Ruud reacts as he plays Italy's Jannik Sinner during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Italy's Jannik Sinner serves the ball to Norway's Casper Ruud, during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Norway's Casper Ruud hits a forehand to Italy's Jannik Sinner during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Norway's Casper Ruud reacts as he plays Italy's Jannik Sinner, during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.

Italy's Jannik Sinner, left, plays Norway's Casper Ruud during their quarterfinal tennis match at the Italian Open, at the Foro Italico, in Rome.