The two main headlines hitting the news in the past couple of weeks both refer to top players changing their coaching set-ups.
The beginning of August is the best time for players to assess their situation as Roland Garros and Wimbledon are over and there's usually a lull in the schedule.
Before important tournaments get underway in Toronto and Cincinnati, leading up to the US Open, players tend to take a break to recharge their batteries so it's the perfect moment to evaluate their ups and downs.
Federer had a rich year in 2009 but he's in trouble right now even if he does strongly deny it. It's unusual to see Roger playing in tournaments without winning them, which has been a recurring theme for almost a year now.
Of course he won the Australian Open but the Swiss player has won nothing else between last year's Cincinnati Masters and now, which was unheard of until this year.
At the same time, it is interesting to note the way this down period has manifested following one of the best moments in his career - winning the 2009 French Open and Wimbledon back-to-back. With Nadal out injured he also regained the world number one ranking, when many people suggested he was close to retiring.
Maybe he needs to slow down. It would be understandable after the birth of his twin daughters last summer.
Roger seemed unbeatable last year after the double success of the French Open and Wimbledon titles and was the favourite to win the US Open. At the time only John McEnroe said he would need to decompress. McEnroe was right but surely even he didn't know Roger's state of mind would last this long.
After the US Open, where he lost in the final to Juan Martin Del Potro, he suffered numerous defeats and many were upset with his attitude. He didn't seem motivated anymore, or to care about the result of his matches. I wrote a piece after Indian Wells and Miami about how Federer seemed more set on losing than winning as it was obvious that he wasn't playing with his usual determination.
Roger's lack of motivation is even more apparent now that it's been there for almost a year. But Annacone can re-introduce the elements he needs to regain that motivation.
Just announcing he was hiring Annacone will have given Roger the boost he needs. He will take a break from his usual routine and build another one.
Sometimes only small changes are required to regain your motivation - events don't really matter. What does matter is the way the player feels and the way they express themselves.
The Andy Murray situation is also interesting. He's reached two Grand Slam finals but is yet to win one.
He needs an X-factor, which should make all the difference, and the Scot believes that he needs a competent person to help him find it.
But, after splitting with coach Maclagan, he needs to ask himself the following questions: Who can help me find that X-factor? Who can make me win majors?
The answer is clear to me: very few people. Andy needs a coach with extra skills. He has great potential but he is the only one who knows who would be best for him. Understanding this is a major factor if he is to achieve greater success.
We will find out after the US Open whether he has this understanding or not, as that's when he will officially announce his next coach.