Sri Lanka's new skipper Upul Tharanga won the toss and sent Australia in to bat in the second Twenty20 in Geelong, where Sri Lanka will secure a series win if they chase down their target later in the evening. Australia made two changes to their XI, with fast bowler Jhye Richardson handed a debut and batsman Ben Dunk called in to bolster the top order. Fast bowler Billy Stanlake was dropped along…