Substitute Caleb Watts scored the only goal as Exeter started their Premier League season with a superb 1-0 win over big-money side Rotherham.
The Grecians had the upper hand for a long time but the Millers will regret not taking the clear-cut chances they created in an exciting game in Devon.
Debutant Josh Magennis had his shot against the crossbar by away goalkeeper Dylan Phillips just a minute after the game began, while Jack Acheson and Vince Harper also missed good chances.
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Caleb Watts' simple tap-in goal gave Exeter the lead against Rotherham.
Johnson Clarke-Harris had Rotherham's first attempt of the game just before half-time but his header from just five yards went wide.
After the break, Reece Cole was denied twice by Phillips and Rotherham's Hakim Odofin missed another good chance when he struck the outside of the post, heading home from six yards.
Just three minutes after Watts came on, Jonley Ifeko struck the decisive blow when he flicked in a superb cross from close range to give Exeter the lead they deserved.
Rotherham looked unlikely to equalise as the Greeks made a comfortable start to the season.
