Novak Djokovic takes on Jannik Sinner in the Australian Open semifinal on Friday, and starts as the distinct underdog. He was massively fortunate to reach the final four thanks to a fourth-round walkover and Lorenzo Musetti’s retirement from their quarterfinal with injury despite leading by two sets. Additionally, this is a matchup that really does not favour the Serb; he has lost each of the last five meetings against Sinner and failed to win a set in the last three. Across four completed matches that Djokovic has played at the Australian Open so far, he has won 58.5% of all the points that he has played while returning second serves. Meanwhile, through the five matches that he has played at this tournament, Sinner has won 55.4% of the points behind his won second serve.