British star's Wimbledon preparations took a big hit with shock first-round defeat to Jordan Thompson.
Asensio won the La Liga, UCL, Fifa Club World Cup and the Uefa Super Cup last season.
Nadal won the French Open for an unprecedented 10th time earlier in the month.
Murray has been the world number one for 32 weeks.
Wawrinka suffered defeat to Federer and Nadal in the Australian Open and French Open respectively.
Rafael Nadal has taken a three-week break after the French Open and will return to action at Wimbledon.
The 18-time grand slam champion praised for skipping clay court campaign to focus on SW19.
Briton admits performances in 2017 have not been good to remain atop of the ATP rankings.
Rafael Nadal became a 15-time Grand Slam champion after his victory at Roland Garros.
Mats Wilander believes Rafael Nadal's French Open win has restarted his campaign.
Nadal has played 10 tournaments thus far in 2017 - winning four titles.
After Roland Garros, reigning French Open champion leads Swiss by almost 3,000 points in the Race to London.
Nadal and Federer have won a combined seven titles this season including two Grand Slams.
Nadal won his 10th French Open title at Roland Garros in 13 visits.
Nadal has made seven finals and won four titles thus far in 2017.
Spaniard won his 10th French Open crowd by beating Stanislas Wawrinka.
Rafael Nadal's win at the French Open has taken him to number two in the ATP rankings.
Wawrinka was outclassed by Nadal, losing the final in straight sets.
Mallorcan secures a historic 10th title at Roland Garros courtesy of dominant straight-sets win.
Nadal is looking to achieve La Decima — winning the French Open for a record 10th time.
Spaniard remains on course to achieve 'La Decima' after comfortable straight sets win at Roland Garros.
2015 champion prevails 6-7 6-3 5-7 7-6 6-1 to seal second final appearance at Roland Garros.