Compiling a tennis win streak is one of the hardest things in the sport. Jannik Sinner knows

World No. 1 Jannik Sinner has extended his winning streak to 21 consecutive matches, losing only two sets during that run, with his latest victory being a 6-2, 7-6(0) win over 19-year-old Spanish wildcard Rafael Jódar in Madrid on Wednesday. Sinner, who stands at 27-2 for the season, has not lost a match since February. His streak is notable but still distant from the all-time records: Martina Navratilova's 74 consecutive wins in 1984 and Björn Borg's men's tour record of 49 in 1978.