Seoul:Looking for English speaking tennis or golf instruction/practice

Hello!  We just moved to Seoul from California, US, and would like to continue having our kids play golf and tennis.  Please help refer us to any English speaking youth leagues in Seoul or English speaking instructors in Seoul. We live close to Banpo Sports Complex and we can possibly get tennis courts or golf simulator areas to play/practice but we will need help with reserving in Korean.  Any help or suggestions would be greatly appreciated.   Thanks! Angela