India's top singles player Prajnesh Gunneswaran headlines the field for the second edition of the Chennai Open ATP Challenger 80 tennis tournament, to be held at the SDAT Nungambakkam stadium here from February 4 to 10.

The tournament, to be organised by Tamil Nadu Tennis Association, carries a prize money of USD 54,500. Prajnesh, currently ranked 109 on the ATP list, had recently qualified for the Australian Open, the year's first Grand Slam before losing in the first round.