goes through Green Group undefeated after beating Norrie 6-2, 6-1.Zverev awaits.#NittoATPFinalspic.twitter.com/1nUfuevbOh "Player welfare is at the heart of everything we do. As a result, we have rules in place for moments like this, and although we have had no cancellations to date in the league, it is of course disappointing to get to this stage of the season and have to use them." A nip-and-tuck deciding set swung the way of Ruud in the tie-break when he gobbled up a poor second serve and then finished the job with an ace.Your 2021#NittoATPFinalssemi-finals:🇷🇸@DjokerNolev.@AlexZverev🇩🇪🇷🇺@DaniilMedwedv.@CasperRuud98🇳🇴pic.twitter.com/ec9siLjFk2 "The health and safety of all those involved with the event is our highest priority."