Sydney [Australia], January 9 (ANI): Former Australian captain Michael Clarke believes Steve Smith can become the best Test opener if he is given the opportunity to replace David Warner. Warner’s final dance in red-ball cricket was against Pakistan at his home ground, the Sydney Cricket Ground (SCG), last week. With the new World Test Championship cycle already underway, the defending champions will need to find a quick replacement for their former star opening batter. Clarke backed Smith to do the job and told ESPN’s Around The Wicket show, “If he [Smith] wants to open the batting and they gi…