Tennis star Roger Federer has won the BBC Overseas Sports Personality of the Year for a record fourth time after a public vote.

The 36-year-old Swiss topped the poll ahead of five other shortlisted nominees.

Federer became the first man to win Wimbledon eight times and extended his record to 19 Grand Slam titles in 2017.

Boxer Muhammad Ali and athlete Usain Bolt are the only other people to have won the BBC award three times.