Dinesh Karthik smashed a maiden fifty in Twenty20 internationals to help set up the hosts' massive 82-run victory over South Africa at Rajkot on Friday and send the five-match series into a decider. As it happened | ScorecardThe 37-year-old Karthik, who played the team's first T20 international against the same opponents in 2006, smashed 55 from 27 deliveries to produce late fireworks as India posted 169-6 in their 20 overs. (ANI Photo) South Africa, who won the opening two matches of the series, got off to a horrible start in their chase when captain and opener Temba Bavuma retired hurt after suffering blows to his hand and body. Batting mainstay Quinton de Kock, who returned to the side after missing the last two matches with injury, departed soon after when he was run out -- leaving South Africa a mountain too steep to climb.