By Martyn Herman
LONDON (Reuters) - It has been more than 15 years since Roger Federer, Rafael Nadal and Novak Djokovic began their collection of Grand Slam titles and the bad news for anyone eyeing tennis's big prizes is their stranglehold on men's tennis is as tight as ever.
Nadal, a few days after turning 33, proved unstoppable at Roland Garros for a 12th time on Sunday as he crushed Dominic Thiem with the same frightening intensity that he displayed when beating Mariano Puerta to win his first French Open in 2005.
Federer, who will be 38 in August, played dazzling tennis to reach the semi-final before Nadal and a Parisian gale did for his hopes of a record-extending 21st Grand Slam title.
The 32-year-old Djokovic, meanwhile, is stuck on 15, three behind Nadal, after falling agonizingly short of holding all four majors at the same time for the second time.
Between them they now have 53 Grand Slam titles from the last 64 played dating back to Federer's first Wimbledon triumph in 2003 when he was aged 21.
What is more, the trio have shared the last 10 between them in their third era of total domination, having won 11 in a row between 2010 and 2012 and 18 in a row between 2005 and 2009.
Austrian Thiem, ranked fourth in the world but still without a Grand Slam title, is now 25. By that age the three players above him were already multiple Grand Slam champions.
Thiem said that he will strive to get better and better, but knows they will too. Their relentless desire to stay ahead of the chasing pack is why only seven other men have won a Grand Slam title in the last 16 years.
With the exception of Andy Murray and Stan Wawrinka who have won three apiece, four of them have been one-Slam wonders. Marat Safin won his second major at the Australian Open in 2005 but that was before either Nadal or Djokovic had begun their count.
After watching Nadal for the past two weeks, seven-time Grand Slam champion Mats Wilander believes the Spaniard is still improving his game. "The way he hit his backhand against Thiem tells me he's still working at his game, developing another way of playing," the Swede, working for Eurosport, said.
While chiefly motivated by his rivalries with Nadal and Djokovic, Federer says his enthusiasm to keep evolving as a player comes from watching the likes of Stefanos Tsitsipas and Alexander Zverev and the new challenges they bring.
"It never gets boring, because every day plays different, every opponent plays different, every guy gives you different struggles," Federer said last week.
The way things look right now it might be Old Father Time that finally brings down the curtain on the current era, rather than the young pretenders stuck in the shadow of arguably the greatest three players ever to swing a racket.
"Being in this era, it seems like it's going to be hard for anyone to kind of do something the same that three of us did," Djokovic said last week.
"I don't know what the future will bring, but I'm sure it will be bright."