A father-son duo in San Antonio to watch their beloved Knicks win the NBA championship Saturday claimed they were assaulted by a pair of Spurs fans outside of their hotel. The victim, 29, told KSAT that he and his father, 62, were jumped by two people wearing Spurs gear near Hotel Valencia Riverwalk around 12:30 a.m. Saturday. The man said he and his dad, both wearing Knicks jerseys, were returning from the Game 5 title-clinching win when they were targeted. His father was taken to a local