WEST WINDSOR — Kim Clijsters entertained tennis fans Sunday at Mercer County Indoor Tennis Center as National Junior Tennis Learning of Trenton held its 30th Annual Gala. Clijsters, a six-time Grand Slam tournament champion with four individual and two doubles titles, played with various partners for nearly three hours in front of an appreciative crowd. Kim Clijsters posed with members of Princeton University men’s and women’s tennis team. (L.A. Parker/The Trentonian)The International Tennis Association Hall of Fame member fires a forehand.,,, (L.A. Parker/The Trentonian)…..then prepped for a backhand. (L.A. Parker/The Trentonian) NJTL of Trenton honored longtime supporters Joe and Sheryl Punia. (L.A. Parker/The Trentonian) From left, Honorary Co-Chairs for NJTL Trenton’s 30th Gala Albert Stark and Ginny Mason, with honorees Joe and Sheryl Punia. (L.A. Parker/The Trentonian) Tennis fans packed Mercer County Indoor Tennis Center. (L.A. Parker/The Trentonian) Show Caption1 of 6Kim Clijsters posed with members of Princeton University men’s and women’s tennis team. (L.A. Parker/The Trentonian)Expand NJTL of Trenton, which creates opportunities for success by enriching the lives of under-resourced youth through tennis, education and mentoring programs, hosted a six-hour event that featured Clijsters and members of Princeton University’s men’s and women’s tennis teams. The event provided a competitive tennis exhibition, auction, buffet, open bar, dinner and music. NJTL Trenton honored longtime supporters Sheryl and Joe Punia.