To play at a consistent level at Grand Slams is a very difficult task. Rod Laver and Novak Djokovic are the two contrasting examples. In the Open Era, Rod Laver won 4 majors consecutively in 1969 and Novak Djokovic won 4 majors from mid-2015 to mid-2016.
Also Read: Most Matches Played in Grand Slam
Let's take a look at the tennis Stats of players who won back-to-back Grand Slam titles without losing.
Tennis Stats | Players to win back-to-back Grand Slams
Rod Laver | 4

Rod Laver knows what it takes to complete tennis’ ultimate achievement, having won the Grand Slam as an amateur in 1962 and again as a pro in 1969. He defeated Tony Roche in the US Open final (7-9, 6-1, 6-2, 6-2) to win a fourth consecutive major title. Laver won the Australian Open, French Open, Wimbledon, and US Open in the same calendar year (1969), which still stands as a unique achievement in the Open era.
As a professional Laver was banned from playing the Grand Slam tournaments as well as other tournaments. In 1968, Laver was again able to compete. During his career, he won eleven Grand Slam tournaments, eight Pro Slam tournaments, and five Davis Cup titles. He was also the first player to win four consecutive Grand Slams in the same calendar year in 1962.
Novak Djokovic | 4

Novak Djokovic also achieved four consecutive Grand Slam titles. He won the last two majors of 2015 (Wimbledon and US Open) and the first two Slams of 2016 (Australian Open and French Open). By winning the title in Paris in 2016, Djokovic completed a 'Career Grand Slam' (winning all four major tournaments), the fourth man to do so in the open era after Andre Agassi (1999), Roger Federer (2009) and Rafael Nadal (2010). He also completed a golden slam in 2023 when he won all four grand slams and the Olympic games.
Djokovic is the first man to win 24 Slam titles. He has tied Margaret Court for the most ever of any player in any era. Djokovic also won 10 Australian Open, which makes him the record holder for the most titles at that tournament.
| Rank | Country | Player | Streak |
| 1 | AUS | Rod Laver | 4 |
| 1 | SRB | Novak Djokovic | 4 |
| 3 | USA | Jimmy Connors | 3 |
| 3 | USA | Pete Sampras | 3 |
| 3 | SUI | Roger Federer | 3 |
| 3 | SUI | Roger Federer | 3 |
| 3 | ESP | Rafael Nadal | 3 |
| 3 | SRB | Novak Djokovic | 3 |
| 3 | SRB | Novak Djokovic | 3 |
| 3 | SRB | Novak Djokovic | 3 |
| 3 | SRB | Novak Djokovic | 3 |
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