Federer, Nadal and Djokovic have dominated the men's singles game for over a decade winning 33 of the last 41 Grand Slams.
Kuznetsova has praised Federer's wife Mirka and his team for being the cornerstone of his success at 36.
Djokovic has not played since losing to Hyeon Chung in the Australian Open fourth round, after which he underwent an elbow surgery.
Federer lost three Grand Slam finals to Djokovic, who was in his prime during the period and was markedly better than the Swiss ace..
Federer is currently unbeaten in 2018 having first won the Australian Open and then followed it up with the title at the Rotterdam Open.
The Spaniard has confirmed his withdrawal from Indian Wells and the Miami Open after suffering a recurrence of a hip injury.
The 20-year-old German feels he has proved he can win a grand slam title in the future with a handful of high-profile wins.
Rafael Nadal, who suffered a hip injury at the 2018 Australian Open, was expected to return to action at the Mexican Open.
Roger Federer has previously tipped Alexander Zverev and Nick Kyrgios as potential future Grand Slam winners.
Lewis Hamilton is targeting his fifth F1 drivers' title in 2018 with Sebastian Vettel expected to be his main rival.
Roger Federer is currently on a break and will return to action at the Indian Wells Masters beginning 8 March.
The Serbian is supportive of the changes but wants a debate on the timing of the World Cup of Tennis.
A decision over whether the Swiss will compete on clay in 2018 will not come before the end of the BNP Paribas Open.
Roger Federer won his 20th men's singles Grand Slam title at the 2018 Australian Open.
Roger Federer, Rafael Nadal and Novak Djokovic have won a combined 48 Grand Slams.
Roger Federer and Caroline Wozniacki already lead the list of top tennis prize money earners in 2018.
Roger Federer currently has 97 men's singles titles, which include 20 Grand Slams. He is second on the list behind Jimmy Connors, who has 109.
New proposals to overhaul the Davis Cup into a World Cup-style competition have drawn a mixed response from the tennis world.
Roger Federer and Rafael Nadal have played each other 38 times during their ongoing 14-year rivalry that started at the 2004 Miami Open.
Federer has won a remarkable nine titles after making a comeback and his audacious achievement was regarded as the best comeback of the year.
Federer does not have any future records that he wishes to match and will take them as when they come his way.
The rivalry between Roger Federer and Rafael Nadal will always be considered as one of tennis' greatest-ever.