This weekend's UFC 228 event was originally set to feature two title fights. In the night's main event, UFC welterweight champion Tyron Woodley is set to defend his world title against the surging Darren Till. Injury plagued Nicco Montano was set to defend her world title for the first time, against Valentina Shevchenko in tomorrow's co-main event. Montano would ultimately withdraw from the bout on the morning of weigh-ins. UFC officials have released a statement on the matter, via UFC.com: As a precautionary measure, UFC flyweight Nicco Montaño was transported to a medical facility Friday morning due to health concerns. The scheduled flyweight championship bout between Montaño and Valentina Shevchenko at UFC 228 has been cancelled. UFC 228 takes place at American Airlines Center in Dallas, TX on Saturday night live on Pay-Per-View at 10pm/7pm ETPT. Tyron Woodley takes on Darren Till with his welterweight championship on the line in the main event.