Marinko Matosevic's rise of three places this week has taken the Victorian to a career-best ranking of No.57.

UPDATE 2.50pm: Matthew Ebden has advanced to the second round of the US Open for the first time in his career, while Marinko Matosevic fell in five sets.

After successfully qualifying, Marinko Matosevic and Casey Dellacqua have gone out in the first round of the Cincinnati WTA/ATP event in Ohio.

Australians Marinko Matosevic and Casey Dellacqua have qualified for the main draw at the combined ATP/WTA event in Cincinnati with wins on Sunday.

Matthew Ebden has entered the Rogers Cup main draw as a lucky loser, while compatriots Marinko Matosevic and Anastasia Rodionova fell in qualifying.

Marinko Matosevic has gone down in the second round of the ATP World Tour event in Washington to German Tobias Kamke.

UPDATE: Marinko Matosevic won a hard-fought first round match at the ATP Citi Open in Washington DC on Tuesday, while Matt Ebden fell at the first hurdle.

Marinko Matosevic has jumped 17 places in this week's ATP World Tour rankings, hitting a career-high ranking of world No.64.

Marinko Matosevic has fallen in the semifinals of the ATP Farmers Classic event in Los Angeles to Lithuanian Ricardas Berankis.

Marinko Matosevic has seen off the challenge of American Michael Russell to advance to his second ATP semifinal in 2012 at the Farmers Classic.