Dambulla: Vaibhav Sooryavanshi broke a 21-year-old record on Sunday for the fastest List A fifty with a 11-ball half-century for India A in the tri-series final against Sri Lanka A.Sooryavanshi surpassed the previous record held by Sri Lankan Kaushalya Weeraratne who had reached the milestone in 12 balls back in 2005. The 15-year-old (94 off 29).The Indian teenager who is ready to make his India debut later this month was also close to hitting the joint fastest List A century but was dismissed on 94 in the ninth over with India A's score on 132. His explosive innings featured 10 fours and eight sixes.He reached to fifty with five sixes and five fours dismantalling the Sri Lanka A attack.Read More: Rise of Gurnoor Brar, Prasidh Krishna gives India shot in the arm on road to 2027 ODI World CupThe youngster signalled his intent immediately, smashing two sixes and three fours off his first five balls. He initially targeted the leg side against the seamers before finding gaps through the off side when the field was adjusted.Two sixes straight down the ground off pacer Dulaj Samuditha brought up his record-breaking fifty His sixes over extra cover, total of three, were key instances of his innings.Sooryavanshi was very close of equalling Jake Fraser McGurk's 29 ball century record but fell short by one stroke.The innings also came days after a heated encounter between the two sides earlier in the tournament, when Sooryavanshi was involved in a verbal exchange following sledging from a Sri Lanka A player during a league-stage fixture.