Former US Open champion Dominic Thiem has delayed his comeback from injury and will not play at the upcoming Australian Open. Thiem, 28, tweeted on Tuesday that he has decided to return in late January at the Cordoba Open in Argentina. The Australian Open in Melbourne start on January 17. Thiem, who won the US Open in 2020, suffered a wrist injury in June and had some problems again recently. The Austrian said he was “practicing normally” again now but named the latest comeback delay “the right decision in order to have a good return to competition.” Thiem is the latest big-name player not to …