The 20-time Major champion Rafael Nadal tested positive for the coronavirus after landing in Spain following his recent trip to Kuwait and Abu Dhabi. Rafa competed at the 13th edition of the Mubadala World Tennis Championship last week, losing both matches to Andy Murray and Denis Shapovalov and returning to Spain for the final preparations ahead of the planned Melbourne trip.Nadal feels fine, but he has to stay at home and endure the quarantine. Thus, he has to think about reaching Australia in time for the season’s start if he decides to play at the first Major. Rafa skipped all the action since early August, playing two matches in Washington and calling it a season due to a foot injury experienced at Roland Garros.On Friday, the Spaniard returned to ac …