5 Players who would have more Grand Slams if not for the Big Three 

#4 Stanislas Wawrinka

Stan Wawrinka reached the quarterfinals of the 2020 Australian Open

The most decorated player on this list, Stan Wawrinka has had a brilliant career thus far. His rise from being a home-schooled boy to superstardom has been nothing short of spectacular. The Swiss spent most of his career under the shadow of his compatriot Roger Federer but finally broke out after winning his first Grand Slam in 2014 at the Australian Open by beating Rafael Nadal in four sets.

Wawrinka reached the quarterfinals of the Wimbledon that year only to lose to Federer in four sets. Next season, he beat Novak Djokovic at the French Open final in four sets after dropping the first. He won his third Slam after beating Djokovic at the US Open in 2016. Stan had started to disrupt the power dynamics on tour and was a contender whenever he stepped on the court.

Possessing arguably the best single-hand backhand on tour, Wawrinka reached the semifinals of the World Tour Finals in 2013, losing to Djokovic and in 2014 and 2015 only losing to Federer on both the occasions.

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#5 Marin Cilic

Marin Cilic turned pro in 2005

Marin Cilic caught the world's attention when he won the 2014 US Open. It was a huge surprise as the entire tennis fraternity was eagerly anticipating a Federer-Djokovic clash in the final. However, that wasn't to be as Kei Nishikori beat Djokovic in the semifinals and Cilic knocked out Federer at the same stage in straight sets. Cilic won the tournament having dropped only three sets through the course of the competition.

Cilic didn't really kick on from there but eventually reached the quarterfinals of the French Open in 2017 and 2018 only to lose to Wawrinka and del Potro respectively. He reached the final of the Wimbledon in 2017 but lost to Federer in straight sets.

Cilic followed up a fine 2017 season by reaching the 2018 Australian Open final after beating Nadal in the quarterfinals. He set up the showpiece clash with Federer in the final. Despite being injured, Cilic forced the match to the fifth set but eventually lost to the Swiss maestro. His terrific 12 months saw him climb up the rankings to world number 3 at the end of January 2018. He has also featured in the World Tour Finals four times - in 2014, 2016, 2017, and 2018.