Thailand's Prom Meesawat struck a one-under-par 71 to maintain his share of the lead with Sweden's Rikard Karlberg in the second round of the King's Cup on Friday. Korea's Mo Joong-Kyung, 42, trailed in third place with a 68 in the $1 million Asian Tour event at the Black Mountain Golf Club in Hua Hin. Despite dominating play at the season-ending tournament, Prom remained cautious about his chances of victory. "It's going to be a tough weekend as the door is still open for everyone. I just want to maintain my composure and get an under-par score for the next two days," he said. The 29-year-old, who hails from the coastal town of Hua Hin, is also aiming to seal his place with Team Asia at the inaugural EurAsia Cup in Malaysia in March. "I know I still have an outside chance of earning my place in the EurAsia Cup and if I do well this week, the result will basically take care of that," said Prom, according to a report from the Asian Tour. Karlberg made a late comeback with two birdies in his last three holes to prevent home favourite Prom from taking the outright lead. The Swede struggled under gusty conditions and was two-over in his second round after 12 holes, but a birdie on the 13th restored some confidence. "It was a horrible round for 12 holes. I really struggled. I didn't play well and the putts didn't fall... But the wind came down the right way on 17 and 18 and I was glad I finished off well," said Karlberg. The tournament is the final event of the season on the Asian Tour calendar. Leading second-round scores at King's Cup Golf Hua Hin (par 72): 136 -- Prom Meesawat (THA) 65-71, Rikard Karlberg (SWE) 65-71 137 -- Mo Joong-Kyung (KOR) 69-68 138 -- Adam Groom (AUS) 69-69, Kodai Ichihara (JPN) 70-68, Chawalit Plaphol (THA) 69-69, Kieran Pratt (AUS) 68-70, Lin Wen-tang (TPE) 66-72, Pavit Tangkamolprasert (THA) 69-69 139 -- Johan Edfors (SWE) 70-69, Prayad Marksaeng (THA) 68-71, Hung Chien-yao (TPE) 72-67, Alex Cejka (GER) 70-69 Selected scores: 140 -- Anirban Lahiri (IND) 69-71 144 -- Siddikur Rahman (BAN) 71-73 Source: AFP