Hahn led the British 1-2 in 26.96sec at the Dubai Club for the Disabled track in the first event of this year's series. 

Double Paralympic and world champion Hermitage, who is in the T37 rather than Hahn's T38 category, will be satisfied with second place after recovering from potentially career-ending stress injuries to her feet and legs following her success at last summer’s World Para Athletics Championships in London.

She crossed in 28.41 for second place.

Amal Youssef of Egypt was third in 33.06.

Reigning Paralympic champion Asmahane Boudjadar triumphed in the women's F33/34 javelin.

She threw 11.63 metres to win once points for different levels of disability were considered.

Frances Herrmann of Germany placed second, despite a longer throw of 17.60m, and Faezah Kermani of Iran took the bronze medal with 16.71m.

Tunisia's Walid Ktila was among other opening day winners with a time of 1min 57.82sec for the men's T34/53 800m.

Hamad Aladwani of Kuwait took second place, in 1:58.63 and Switzerland's Bojan Mitic third in 1:59.40.

The event is due to continue tomorrow.