5 oldest male Grand Slam finalists of the Open Era
#1. Ken Rosewall (1974 US Open) - 39 years and 310 days
Ken Rosewall is one of the greatest players to have ever played tennis and he was in brilliant form even during his 30s and 40s. He won eight Grand Slam titles throughout his career and has held numerous all-time and Open Era records. One such record is being the oldest Grand Slam finalist in the history of tennis.
This record first came at the 1972 Australian Open and he broke this record twice, once at the 1974 Wimbledon Championships and again a few months later, at the 1974 US Open. At the 1974 US Open, Rosewall was the fifth seed and reached the quarter-finals after two straight set and two four set victories.
In the quarter-finals, he came back from a set down to defeat Vijay Amritraj following which he beat compatriot and second seed John Newcombe in similar fashion to set up a final clash with top seed Jimmy Connors. However, the match was extremely one-sided with Rosewall winning only two games throughout the entirety of the match as Connors beat him in straight sets to claim his maiden US Open title and third Grand Slam title.