Coach Ivan Ljubicic shares thoughts on Roger Federer's final tournament

Coach Ivan Ljubicic said Roger Federer being surrounded by fellow Big Four group members contributed to the Swiss being very emotional in his final tournament.  Last week, Federer retired from professional tennis at the Laver Cup.On Team Europe, Federer was teammates with Rafael Nadal, Novak Djokovic, and Andy Murray.After teaming up with Nadal in his final match, Federer was very emotional as he broke down in tears several times during his speech. Nadal himself was also very emot