The defending champion and two former champions will be among the the field for January's Heineken tennis open in Auckland.
Four of the field have been in the world's top five at some stage in their careers, including the Spanish top seed and 2007 champion David Ferrer, who's currently ranked seventh.
The other former champion is the German Philipp Kohlschrieber, who beat the former world number one Juan Carlos Ferrero in the 2008 final.
The defending champion and second seed is the 2 metre six centimetre tall American John Isner.
The tournament director Richard Palmer says there's a balance of experience and emerging talent, including the young Dutchman Thiemo de Bakker, a former junior world number one.
Palmer says the 10th seed is being coached by fellow Dutchman and former Wimbledon champion Richard Krajicek.