Kyrgios’ Wimbledon final adventure

But the more tense he became the more routinely he failed to make his first serve, offering the opportunity to his opponent to break him on his weaker second serve.

This problem did not occur to Kyrgios against Garin because he was able to maintain successful first serves during the game.

The key to his composure was that there was never a doubt about who was dominating that match.

But when such doubt reared its ugly head for Kyrgios against Djokovic in this year's Wimbledon Final, Kyrgyos also lost his cool in his four sets to one loss to Djokovic.

After a just about perfect first set win against Djokovic, the latter stepped up a level, but then Kyrgios could not match him.

Yet had Kyrgios been able to stay concentrating on every ball when he lost the momentum, he may have been able to come back and beat Djokovic as he did twice before in their only two previous encounters.

In terms of brilliant skills, Kyrgios may be able to match Djokovic, when he can stay relaxed and focussed on his game.

But where Djokovic proved superior to Kyrgios at Wimbledon was in his tremendous self-discipline in not allowing himself be distracted by negativity.

But then Djokovic always has had at least one trainer and he has taken his training, like Nadal and Federer, extremely seriously throughout his tennis career.

Neither of these can be said about Kyrgios.

What is perhaps the greatest barrier to Kyrgios' winning a Grand Slam and lasting at the top of tennis is his poor emotional maturity and his lack of motivation for seeking help to overcome it.

For example, he admitted, that before his previous match with Nadal he stayed up partying the whole night.