Wicket-keeper batsman Alex Carey has said on Wednesday that Australia have put extra time into Shakib al Hasan having identified the Bangladesh all-rounder as the biggest threat in their match at Trent Bridge in Nottingham at the ICC Cricket World Cup 2019.Shakib al Hasan scored an unbeaten century (124) and claimed two wickets as he guided his team to a brilliant win over the West Indies their previous match.Australia have won four matches and lost one so far in the tournament.