Roger Federer is the first player to win more than 5 titles at the World Tour Finals. Federer is the first and only player to reach 10 finals overall and 16 semifinals. He has appeared in the 8-man year-end tournament 14 consecutive times and total 17 times, and is the only player to achieve both these feats in the open era.
https://en.m.wikipedia.org/wiki/List_of_career_achievements_by_Roger_Federer

