Golfer Singh admits to using deer-antler spray

Vijay Singh of Fiji watches his tee shot on the fourth hole during the third round of the Wells Fargo Championship in Charlotte, North Carolina, in this May 7, 2011, file photo. The former world No 1 has admitted using deer-antler spray, but says he was unaware the extract contained an insulin-like growth factor that is banned by the PGA Tour. Chris Keane / Reuters / Files