DUBAI, Feb. 17 (Xinhua) -- Women's world number one Serena Williams and men's world number two Nocak Djukovic are among the top stars in the line-up for the 22nd Dubai Duty Free Tennis Championships which starts here today.

In the women's line-up are also world number four Agnieszka Radwanska from Poland and Venus Williams, the one year older sister of Serena Williams.

In the men's line up are also Swiss tennis ace Roger Federer, who won in Dubai five times and is currently number eight in the ATP world rankings and Argentine's Juan Martin del Potro, ranked number four.

The tournament starts on Monday, February 17 with the women's first round which will see the evening match between Venus Williams and Russia's Elena Vesvina (ranked 33). The women's final will take place on Feb. 22, the day when the men's qualifying round will start.

The 22nd Dubai Duty Free Tennis Championships will run through March 1.