DAVYDENKO’S LONGEST WIN STREAK; TSONGA’S FIRST FIVE-SETTER; FEDERER’S HEWITT RIVALRY IS EPIC

* Nikolay Davydenko has been on a tear of late and now it is officially the best run of his career. The Russian’s almost four-hour 6-2, 7-5, 4-6, 6-7(5), 6-3 win over Fernando Verdasco Monday in the Australian Open fourth round was 13th win in a row, besting his previous best ATP winning streak of 12 set last year. “In the fifth set I was fighting my serve, just winning my serve,” Davydenko said. “It was also not so easy beginning [of the] fifth set, but it’s good fighting for me. It was four hours, and some good points in the fifth set.” Davydenko now sets up a highly-anticipated quarterfinal match with world No. 1 Roger Federer, whom he has beaten the last two times after losing the first 12 meetings with the Swiss maestro.

* Against Davydenko, Verdasco served 20 double faults. According to THE BUD COLLINS HISTORY OF TENNIS ($35.95, New Chapter Press, www.NewChapterMedia.com) the most double faults ever hit in a me’s match at the Australian Open came when Gerald Patterson hit 29 in 1927. In the Open era Guillermo Coria holds the mark with 23 back in 2006.

* Jo-Wilfried Tsonga has finally played the first five-set match of his career and won it against Nicolas Almagro 6-3, 6-4, 4-6, 6-7(6), 9-7, saving two break points at 6:6 in the fifth set. The 24-year-old Tsonga had played 19 four-set-matches prior to this match, posting a 13-6 record, but he surprisingly never extended to five sets. “The last set, I think he was serving unbelievable,” admitted Almagro. “I couldn’t do anything. He’s playing well. I think he has [a] chance to be on the semifinal or in the final.” Before his match against Tsonga, Almagro won six consecutive five-setters and now has a career five-set record of 6-6.

* No. 14 seed Marin Cilic beating No. 4 seed Juan Martin del Potro 5-7, 6-4, 7-5, 5-7, 6-3 after 4 hours 38 minutes gave him the distinction of being the only player outside Top 10 who advanced to the men’s quarterfinals. A similar situation occurred last year, then the only seeded player outside Top 10 in the last 8 was Fernando Verdasco, who was seeded with No. 14 as well. Verdasco’s higher-seeded victim was also the No. 4 seed, Andy Murray, whom he also defeated in five sets.

* Roger Federer has improved his record against former world No. 1 Lleyton Hewitt to 17-7 with his 6-2, 6-3, 6-4 win Monday night, his 15th consecutive wins against the Aussie future Hall of Famer. The Federer-Hewitt rivalry is the seventh longest head-to-head in the Open era in terms of number of matches. The top 10 are as follows

36 – Ivan Lendl vs. John McEnroe (21-15)
35 – Lendl vs. Jimmy Connors (22-13)
35 – Boris Becker vs. Stefan Edberg (25-10)
34 – McEnroe vs. Connors (20-14)
34 – Pete Sampras vs. Andre Agassi (20-14)
27 – Edberg vs. Lendl (14-13)
24 – Federer vs. Hewitt (17-7)
22 – Sampras vs. Todd Martin (18-4)
22 – Agassi vs. Michael Chang (15-7)
21 – Becker vs. Lendl (11-10)
21 – Federer vs. Andy Roddick (19-2)
21 – Rafael Nadal vs. Novak Djokovic (14-7)