Rotherham assistant manager Paul Raynor has warned his defence not to underestimate Oxford on Saturday.
The U's will arrive at New York Stadium having lost their last four League Two games, but Raynor knows their attacking threat could hurt the Millers.
"They look like contenders on paper," he said. "They have got real quality players with a lot of attacking options.
"We believe we can hurt them defensively, if we click we have got a real mix and pace and power.
"So we will need to be on our guard and at our best to nullify their threat and then we can impose ourselves on the game."