The 2011 Singapore Cup (known as the RHB Singapore Cup for sponsorship reasons) starts in June 2011. It is the 14th staging of the annual Singapore Cup tournament. 11 S.League clubs and 5 invited foreign teams play in this edition. The cup was a single-elimination tournament, with all sixteen teams playing from the first round. The first round involved one-off matches. Subsequent rounds involved ties of two legs. The Young Lions have opted out of participation in view of their involvement in the inaugural AFF Under-23 tournament in Indonesia during the period of the competition.