The 29-year-old fifth seed is scheduled to face Swede Jonas Bjorkman in the next round and then world No1 Roger Federer in the quarterfinals.
'I think it's going to be an exciting week,' Henman added. 'I think it's my eighth visit here and it's undoubtedly the strongest field that I've ever played in at this tournament.
'But I'm not really interested in worrying about too many others.'
German third seed Rainer Schuettler earned his first win of the season when beating Austria's Stefan Koubek 6-3, 6-2. Seventh seed Sjeng Schalken ended latest Goran Ivanisevic's comeback with a 6-3, 6-3 win.