Europa Conference League
Coach Antonio Conte confirmed earlier that there had been 13 positive cases at Tottenham, eight players and five members of staff.
Union Berlin's next home game in the Europa Conference League is on Nov. 4 against Feyenoord.
Many clubs refused to release players to 'red list' countries but Spurs' Cristian Romero, Giovani Lo Celso and Davinson Sanchez went on international duty.
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