MEN:
NOVAK DJOKOVIC
Rank: 4
After losing in French Open quarterfinals, he entered grass-court tuneup for first time since 2010. Since 2016 French Open made him first man since Rod laver in 1969 with four consecutive major championships, he has failed to defend any of those titles. Djokovic's once-impervious aura has disappeared. Will unusual part-time coaching arrangement with Andre Agassi pay more dividends in london than it did in ParisIJ
ROGER FEDERER
Rank: 5
After skipping the clay-court season, then losing his first match on grass, he looked back at his best in winning title at Halle, Germany. He is seeking record-breaking eighth Wimbledon men's title. One simply can't count Federer out, as his Australian Open championship in January proved after missing last half of 2016. Time off does him good, clearly.
RAFAEl NADAl
Rank: 2
He enters Wimbledon on a three-week break from competition since winning record 10th French Open title. He has won a total of five Wimbledon matches over past five years. If his knees hold up, he could return to the form that carried him to the Final in five consecutive appearances, including two trophies, from 2006-11.
WOMEN:
ANGElIQUE KERBER
Rank: 1
She is still trying to find her way in 2017 after reaching her first three major Finals last season, including at the All England Club. She is 0-7 vs Top-20 opponents this year, after going 24-9 last year. She became first woman seeded No 1 to lose in the French Open's first round in the professional era, emblematic of a real step back this season.
KAROlINA PlISKOVA
Rank: 3
She leads WTA in aces this season (her twin sister, Kristyna, ranks second). Only 4-5 for her career at Wimbledon, where the surface should suit her game. Her terrific serve should carry her to more wins on grass than it has so far. Victory over Serena Williams in the US Open semifinals last year showed what sort of potential Pliskova has.
VENUS WIllIAMS
Rank 11
She is making her 20th Wimbledon appearance. As usual, she didn't play any tuneup events on grass, but has five past titles at Wimbledon. She showed she's still got game by reaching semifinals at All England Club last year for first time since 2008, then getting to Australian Open Final in January.