Jon Rahm not giving up hope of reigning at the end of a rain-affected Masters

Jon Rahm had leader Brooks Koepka in his sights on day four of the Masters (Charlie Riedel/AP)

Jon Rahm headed into the final day of the 87th Masters in confident mood, despite a sizeable deficit to leader Brooks Koepka at Augusta National.

Rahm trailed Koepka by two shots after completing his delayed second round on Saturday and found himself four adrift by the time play was suspended due to unrelenting rain with the final group on the seventh green.