Rafael Nadal has announced that he won’t be able to compete at the Australian Open this year after suffering another injury issue during the Brisbane International. Nadal returned to competitive tennis this week after almost a year out having not played since last year’s Australian Open. The Spaniard won his first two matches in straight sets, but then pulled up with an issue against Jordan Thompson in the quarter-final and lost. He has since undergone a scan on his hip, where it showed a “micro tear”. Nadal has downplayed the severity of the injury, insisting it’s not the same place as the on…