Bradley Johnson scored twice as Derby County eased past 10-man Hull City to aid their Championship play-off hopes.
Derby took the lead when Craig Bryson teed up Chris Martin who hit the post but Johnson fired in the rebound.
The hosts doubled their lead when some fine play on the wings led to Johnson firing in from close range.
Hull’s Moses Odubajo was sent off for bringing down Tom Ince after the break before Martin powered in a long-range effort and Bryson tapped in late on.
It was a night of few chances for Steve Bruce’s side as they were comprehensively outplayed by Derby, however Sam Clucas came closest to finding a breakthrough when his volley from Ahmed Elmohamady’s ball forced a fine save out of Derby keeper Scott Carson.
Derby, who failed to win in six at home against Hull prior to the victory, remain sixth in the Championship table but have a four-point cushion on seventh-placed Cardiff after their goalless draw with leaders Burnley.
Defeat for Hull, their first away at Derby since October 1984, means they stay in fourth place but see their already-unlikely chances of automatic promotion fade as they lie seven points off second.
The Tigers suffered their heaviest league defeat of the season leaving them without an away win in the Championship since their 1-0 win against Ipswich in February.