24-time Grand Slam champion and world number five Serbian Novak Djokovic and Al-Nassr's Portuguese striker Cristiano Ronaldo met at a tennis club in Lisbon, the capital of Portugal.
Idman.Biz reports that the athletes exchanged signed jerseys with various words written on them.
This season, Novak Djokovic has reached the semi-finals of all four Grand Slam tournaments. He won his 100th championship by winning the ATP-250 tournament held in Geneva, Switzerland.
A few days ago, Cristiano Ronaldo scored his 800th career goal at club level. The five-time Ballon d'Or winner has scored 450 goals for Real Madrid, 145 for Manchester United, 101 for Juventus, 99 for Al-Nassr and 5 for Sporting.