CHENNAI: Captain RS Ambrish (125 off 111 balls, 14 fours, 4 sixes and 3/34) guided Don Bosco (Egmore) to a 36-run win over Nellai Nadar in the TAKE Rotary Serenity Cup inter-school tournament match at VB Nest here on Friday. In another match, left-arm pacer K Sanjay (4/48) picked up a four-wicket haul, including a hat-trick, but his performance went in vain as PS Senior Secondary suffered a 78-run defeat at the hands of St. Bede’s.