By Nick Georgandis
With Wimbledon a week away, there were no changes in the men's or women's Top 10s in the latest ATP and WTA rankings.
But there was movement just outside the men's Top 10, where Japan's Kei Nishikori reached a new career high, moving up two spots to No. 11 despite being idle last week.
Nishikori moved up as Tommy Haas lost two places by being idle this week after winning Halle a year ago at this time.
Roger Federer, who lost Halle a year ago to Haas, won the title on Sunday, allowing him to build his lead over No. 4 David Ferrer to 520 points, while staying within 780 points of No. 2 Andy Murray.
Federer has a tough row to hoe ahead of him with Wimbledon coming up. As defending champion, he has a full 2,000 points to defend, but he has just one title so far in 2013.
Should Federer not repeat, or go down earlier than even the semifinals or final, there is the distinct possibility that he could fall as low as No. 5 in the world, if Rafael Nadal and Ferrer are able to go deep into the tournament.
Nadal was upset by Lukas Rosol in the second round at Wimbledon in 2012 - the last match Nadal would play that year, giving him virtually no points to defend at the All England Club.
Ferrer reached the quarterfinals at Wimbledon in 2012, so if he just matches that and Federer doesn't reach the final, he too can move up.
Federer has not been ranked as low as No. 5 since June 23, 2003. That date was, not coincidentally, the start of Wimbledon, which Federer won two weeks later for the first of his 17 Grand Slam titles.
The biggest move in the Top 100 came courtesy of another former No. 1 - Australia's Lleyton Hewitt. Hewitt reached the semifinals at Queen's Club by upsetting Grigor Dimitrov, Sam Querrey and Juan Martin Del Potro in order before falling to Marin Cilic in a three-set semifinal.
Hewitt climbed from 82nd to 70th with the push. His win over Del Potro was his first against a Top 10 opponent this year, and first since he defeated Juan Monaco in October 2012.
All was quiet in the women's Top 20 this week. Inside the Top 50, Simona Halep climed from 58th to 45th by winning the title at Nurnberg. It was the first WTA victory of her career.
Former Top 10 player Andrea Petkovic, who has lost a majority of the last two seasons to injury, reappeared in the Top 100 on Monday, rising from No. 103 to No. 75. Petkovic lost to Halep in the Nurnberg final, but has climbed 102 places since making her 2013 debut at Indian Wells in early March.