Novak Djokovic is through to the semi-final at the Rome Masters, facing Casper Ruud in a battle for the final. It’s Novak’s 73rd Masters 1000 semi-final, moving closer to Rafael Nadal’s record and advancing into the last four for the 13th time in Rome.Thus, Novak became the second player with 13 semi-finals at a single Masters 1000 event, joining Nadal, who has played in the Monte Carlo semi-final 14 times. Djokovic made the Foro Italico debut in 2007 and lost to Nadal in the quarter-final.A year later, the Serb went all the way to claim his first clay-court Masters 1000 title. Novak lost …