Rotherham United have recorded a slender 1-0 half-time lead over Leyton Orient at the New York Stadium.
Wes Thomas has proved to be the difference between both sides thus far in the encounter.
The 27-year-old striker headed past debutant Ben Alnwick after 10 minutes to bag his first goal for the Millers.
The visitors almost restored parity midway through the half as Dean Cox's free kick caused panic in United's defence, but Mathieu Baudry failed to turn the ball home.