Sheikh Ahmed's daughter of Dubawi has won three of her four starts to date and is unbeaten on the all-weather.
She was third in Listed company on her latest start at Newbury and stepped up on that effort to win in the style of an exciting filly.
Jockey Harry Bentley settled her towards the rear - she relaxed into a good rhythm and travelled smoothly.
The race was slowly run but Harry switched to the outer to get a clear run up the straight.
It proved to be a decisive move with plenty of trouble on the inner. But Nezwaah cruised up with two furlongs to run before quickening clear to win by three lengths.
Roger said: "That was a good performance. She has got a very good turn of foot and has finished her race off strongly. She is from a lovely family which get better with age and there should be more to come from her."