'Biggest mistake of my career': Alexander Zverev apologises for outburst - video

Alexander Zverev has apologised for his outburst at the Mexican Open in Acapulco, calling it 'the biggest mistake of my tennis career'. The World No 3 was fined $40,000 and forfeited prize money and rankings points after he attacked the umpire's chair with his tennis racket and verbally abused him on court. 'No excuse': Zverev regrets attack on umpire's chair that led to expulsion