If there is one man who is set to make a massive impression this grass-court season it is American John Isner.
The 25-year-old has been very slack over the last few years, but he has finally got his act together under the guidance of coach Craig Boynton, and I believe the Floridian will make some serious waves.
At 6'9", Isner has an enormous advantage over his fellow players, and he has a serve which will prove to be a real weapon on grass accompanied by his vastly improved groundstrokes.
Isner has never been the most focused or strong mentally, but the American has really knuckled down over the last 18 months and I would expect him to be a serious contender at Wimbledon.
The fact that Isner is ranked at 19 in the world is frankly ridiculous, because given his talent and attributes he should be significantly higher, and comfortably in the top 10.
Of course, Roger Federer and Rafael Nadal will be expected to contend for every grass-court title this year, but you simply cannot rule out Isner with his belligerent play.
There is something very special about a player who goes for every shot and has such immense power and strength: few players can live with Isner on his day.
I also expect Robin Soderling to challenge strongly, and the surface should really suit his game and the improvements he has made over the last 12 months with Magnus Norman.
The Swede will be brimming with confidence after his impressive run at Roland Garros, and has the game to take on anyone - I expect him to take on Nadal and Federer once more.
There are only a handful of players who could do well at Wimbledon, and you would have to throw in the names of Andy Murray and Sam Querrey as being serious contenders.
Murray has the ability to thrive if he gets a good draw, and this could be the year that he at least reaches the final.
Querrey is a fantastic talent on grass, and the 22-year-old has the game to challenge the world's best players on the surface.
The American is ranked down at 23 in the world, but at 6'6" he is another, like Isner, who could cause a few serious upsets and cannot be ruled out.
It is sure to be an intriguing grass court season, and all eyes will be on the AEGON Championships at the Queen's Club and in Halle to see which players are shaping up nicely for Wimbledon.