By defeating Nadal in the last 8, Cilic also ended a 6-match losing streak against Top 5 opposition at Tour-level. He had not defeated a Top 5 player since defeating No. 5 Nishikori in the round-robin stage at the 2016 ATP World Tour Finals.
By defeating Rafael Nadal in the quarterfinals, Cilic recorded his 2nd victory against a world No. 1. His only previous victory against a world No. 1 came against Djokovic in the quarterfinals at 2016 Paris-1000. The highest-ranked player he had previously defeated at a Grand Slam was No. 2 Murray in the round of 16 at the 2009 US Open. He has a 5-19 win-loss record against Top 2 players overall.