To a question if the so-called pack of challengers which includes the likes of Australian Open finalist Dominic Thiem, Stefanos Tsitsipas and others were any closer to beating the 'Big Three', Amritraj said they were still some way behind.
"All the challengers are still catching up. They are the best behind the top three and there are several others as well. But until they start winning the Grand Slam events and that too on a regular basis, which they will, we have to wait and see how the top three maintain their winning record especially as age is not on their side," he said.