<p>Goran Ivanisevic insisted Sunday there is "no debate" that Novak Djokovic is the greatest player of all time.</p>.<p>Djokovic won a record-equalling 20th Grand Slam title and sixth Wimbledon on Sunday with a 6-7 (4/7), 6-4, 6-4, 6-3 victory over Italy's Matteo Berrettini.</p>.<p>The world number one has now moved level on 20 majors with Roger Federer and Rafael Nadal.</p>.<p>If he wins a fourth US Open in September, he will become the first man since Rod Laver in 1969 to complete the calendar Grand Slam and just the third in history.</p>.<p><strong><a href="https://www.deccanherald.com/sports/tennis/novak-djokovic-beats-matteo-berrettini-to-win-his-6th-wimbledon-title-equals-federer-nadal-on-20-grand-slams-1007494.html" target="_blank">Read | Novak Djokovic beats Matteo Berrettini to win his 6th Wimbledon title; equals Federer, Nadal on 20 Grand Slams</a></strong></p>.<p>"For me Novak is the best ever. He's writing history. He's going to do it in US Open. I strongly believe he's going to do it, he's going to win all four in one year. Then I think story's over," said Ivanisevic, one of the world number one's coaches and a former Wimbledon champion.</p>.<p>"For me it was over a long time ago. It's just who you like more. Between these three guys, 60 Grand Slams.</p>.<p>"It's unreal. For me, not because I'm here, before I was a member of the team, for me he was the best.</p>.<p>"I say he's the only guy who can win four in a row in the same year.</p>.<p>"If he wins US Open, I think it's over. He wants to win more. But for me Novak is the biggest ever. I don't even have to debate about that."</p>
<p>Goran Ivanisevic insisted Sunday there is "no debate" that Novak Djokovic is the greatest player of all time.</p>.<p>Djokovic won a record-equalling 20th Grand Slam title and sixth Wimbledon on Sunday with a 6-7 (4/7), 6-4, 6-4, 6-3 victory over Italy's Matteo Berrettini.</p>.<p>The world number one has now moved level on 20 majors with Roger Federer and Rafael Nadal.</p>.<p>If he wins a fourth US Open in September, he will become the first man since Rod Laver in 1969 to complete the calendar Grand Slam and just the third in history.</p>.<p><strong><a href="https://www.deccanherald.com/sports/tennis/novak-djokovic-beats-matteo-berrettini-to-win-his-6th-wimbledon-title-equals-federer-nadal-on-20-grand-slams-1007494.html" target="_blank">Read | Novak Djokovic beats Matteo Berrettini to win his 6th Wimbledon title; equals Federer, Nadal on 20 Grand Slams</a></strong></p>.<p>"For me Novak is the best ever. He's writing history. He's going to do it in US Open. I strongly believe he's going to do it, he's going to win all four in one year. Then I think story's over," said Ivanisevic, one of the world number one's coaches and a former Wimbledon champion.</p>.<p>"For me it was over a long time ago. It's just who you like more. Between these three guys, 60 Grand Slams.</p>.<p>"It's unreal. For me, not because I'm here, before I was a member of the team, for me he was the best.</p>.<p>"I say he's the only guy who can win four in a row in the same year.</p>.<p>"If he wins US Open, I think it's over. He wants to win more. But for me Novak is the biggest ever. I don't even have to debate about that."</p>