The Qatar ExxonMobil Open tournament heralds the return of the defending champion Rafael Nadal and world No1 Novak Djokovic.
The tournament has four players ranked in the top 10 with the addition of regular visitors Tomas Berdych and David Ferrer.
Berdych won his second ATP World Tour doubles title by partnering Jan Hajek to success in the final at Doha in 2014.
Other players of note in the entry list include Ernests Gulbis and Richard Gasquet.
The cut off for the tournament direct entrants is Nicolas Almagro ranked 71.
Qatar ExxonMobil Open tournament director, Karim Alami believes it is one of the best tournaments ever with plenty of talent on display.