Red Bulls sign Argentine playmaker Kaku as designated player Unknown 01:54 The former Argentina youth international has joined Jesse Marsch's side from Club Atletico Huracan Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsRoland Garros: Naomi Osaka Survives Early Scare as Top Players Struggle in ParisRoland Garros: Juan Martin del Potro Powers into Second Round of French OpenRoland Garros: Ivo Karlovic Becomes Oldest Man to Win Match at Roland Garros for 46 YearsKieran Trippier Targeting End of Season Hurrah After Poor Individual CampaignU-23 Asian Championship Silver Medallist Wrestler Reena Fails Dope TestNick Kyrgios right to hate French Open: Bernard Tomic