Tamil Nadu defeated Goa by 25 runs today to register its third straight win in the Syed Mushtaq Ali Trophy T20 South Zone tournament here today. Dinesh Karthik (56) scored his third half-century on the trot to star with the bat again as Tamil Nadu posted 155 for 5 in its quota of 50 overs before restricting Goa to 130 for 7. Skipper Vijay Shankar returned to the side after missing the first two games owing to injury concerns, but couldn't do much with the bat, falling for four to Amogh Desai.