Reuters Sports News Summary

Tsitsipas wants a fan army like Federer Stefanos Tsitsipas silenced the raucous Roger Federer fan club as he knocked the 20-times Grand Slam champion out of the ATP Finals on Saturday and hopes to one day be as popular as the Swiss great. Only the most one-eyed Federer followers could not have been impressed with the Greek's 6-3 6-4 victory, achieved with the kind of tennis they are used to seeing from their idol. NBA roundup: Celtics rally for 10th straight win Jayson Tatum converted a Daniel Theis steal into a go-ahead dunk with 1:36 to play Friday night as the Boston Celtics scored 13 of the game's final 16 points to rally for a 105-100 victory over the Golden State Warriors in San Franci...