- Tag results for Rafael Nadal
Roger Federer became the oldest ever World No. 1 in the men's Association of Tennis Professionals world singles rankings.
The 36-year-old top seed, a two-time champion at the Dutch indoor event, needs to reach the semi-finals to take back the number one spot from Rafael Nadal.
Federer closed to within 155 points of Nadal after his win last month at the Australian Open against world Cilic.
World number one Rafael Nadal has confirmed he will play in the Wimbledon warm-up event at Queen's Club later this year.
Rafael Nadal expects to be back playing competitive tennis by the end of the month, the world number one revealed on Monday.
Rafael Nadal remained in the number one spot in the men's Association of Tennis Professionals world singles rankings.
Roger Federer closed to within 115 points of top-ranked Rafael Nadal of Spain in the Association of Tennis Professionals men's singles rankings after winning the Australian Open.
Carreno Busta, who reached last year's US Open semi-finals, is the Spain number two at 11th in the world rankings, and he is joined in Bruguera's team.
The Nadal team said the Spanish star was expected to be fully recovered in three weeks and could resume playing in Acapulco late next month.
Spaniard Nadal was trailing the final set 2-0 when he decided to give up to the leg injury.
Nadal will play the opening night match on Rod Laver Arena against Marin Cilic, who has lost five of six matches against the Spanish lefthander.
The Spanish world No.1 has been in ominous form in the first week after coming into the year's opening major tournament with knee concerns.
It will be his 10th Australian Open quarter-final appearance, second only to Roger Federer, and he will face Croatia's sixth seed Marin Cilic.
Fourth-round singles play began Sunday, with third-seeded Grigor Dimitrov facing local hope Nick Kyrgios in a marquee night matchup.
The Spanish world number one raced through the match wasting as little energy as possible in the 6-1, 6-3, 6-1 rout.