This weekend's action on the ATP tour - Federer, Djokovic and Murray all in action!

Novak Djokovic and Roger Federer will contest a blockbuster semifinal in Dubai today

Friday, Saturday and Sunday! the business end of one-week tournaments around the world. So what is in store this weekend?

Dubai Duty Free Tennis Championships ATP-500 (Hard courts), Dubai

Roger Federer and Novak Djokovic are the big names in action in Dubai. With Juan Martin del Potro out with a wrist injury, the path is open to the finals for Tomas Berdych, who defeated Jo-Wilfried Tsonga in the quarters yesterday. If Berdych defeats Philipp Kohlschreiber (who got past Malek Jaziri of Tunisia yesterday), he will either meet Novak Djokovic or Roger Federer, who will contest their blockbuster semifinal match today. Expect a cracking weekend in Dubai.

Abierto Mexicano Telcel ATP-500 (Hard courts), Acapulco

Top players David Ferrer, Andy Murray as well as the likes of Kevin Anderson, Ernests Gulbis and Gilles Simon are all still alive in Acapulco whilst John Isner was beaten by Ivo Karlovic in the battle of giants. Murray takes on Simon, while Dimitrov goes up against Gulbis in the lower half in the quarters. A potential final between Ferrer and Murray is a possibility as Ferrer plays Kevin Anderson. Alexandr Dolgopolov continues his fine form as he takes on Ivo Karlovic.

Brasil Open ATP-250 (clay), Sao Paulo

The top seed is Tommy Haas but the favourite for most was Nicolas Almagro. However, the Spaniard was shocked in the first round by Fredrico Delbonis (remember him, he beat Federer on European clay last year). Juan Monaco and Marcel Granollers are the other top seeds while home favourite Thomaz Belluci and other seasoned dirtballers like Horacio Zeballos, Albert Ramos and Albert Montanes are always dangerous on clay.