The year-end event has plenty of great tennis. Here are five of the most memorable matches.

The Canadian tennis player at one point won 16 matches in a row. Now, he is headed to the Nitto ATP Finals.

Money problems, shifting venues and a costly dispute with China have left the tour looking for answers — and a financial lifeline.

She almost conquered Wimbledon and the U.S. Open and is making her first appearance at the WTA Finals.

He has an impressive game, with a dominating serve and a huge wingspan. Winning a major is next on his list.

Novak Djokovic has taken the top spot for the last two years, but, with his struggles, now it’s up for grabs.