The 2012 ATP Doha event has not seen much parity as nearly all of the seeded players have advanced through to the quarterfinals. The list of quarterfinalists includes top seeds Rafael Nadal, Roger Federer, Jo-Wilfried Tsonga and Gael Monfils.
The only seeded player not to make the final eight in Doha is Alex Bogomolov Jr., the sixth-seeded player at the tournament. He will miss the quarters following his withdrawal from the event with an ankle injury.
Thursday's order of play for ATP Doha will feature the following matches:
CENTER COURT start 3:30 pm
Albert Ramos (ESP) vs  Jo-Wilfried Tsonga (FRA)
 Andreas Seppi (ITA) vs  Roger Federer (SUI)
 Rafael Nadal (ESP) vs  Mikhail Youzhny (RUS)
 Gael Monfils (FRA) vs  Viktor Troicki (SRB)
Of the top four seeds, Tsonga appears to have the least proven opponent ahead of him as Ramos has never been ranked higher than 66th in the world. However, Tsonga has not been at his very best in Doha as the Frenchman dropped a set in the first round and almost dropped a set to Flavio Cipolla in the second round.
Ramos, well-rested following his walkover in the second round, might catch Tsonga off-guard.
Federer has been in cruise control through the first two rounds as he has yet to lose more than four games in an individual set in Doha. It's hard to picture Seppi stopping the Swiss Maestro in the quarterfinals, especially given that the Italian is 0-7 against Federer in matches played and 0-15 in sets played.
Nadal has a solid record against his quarterfinal opponent, Mikhail Youzhny. However, the Russian has four victories over the Spaniard in 12 previous matches. All four of Youzhny's wins over Nadal have come on the hard-court surface and the world No. 2 cannot be considered a lock to advance to the semifinals due to that.
If Gael Monfils is to make the semifinals he'll need to survive Viktor Troicki. Troicki is playing sharp in Doha as he is through the first two rounds there without losing a set. When Monfils and Troicki met in Canada last season, the Frenchman won by the minimum two-point spread and their quarterfinal match looks as though it will be the match of the day.
If the seeds held, Federer would face Tsonga in the semifinals while Nadal would face Monfils.