Danny Webb believes Chesterfield deserve their place in the FA Cup second round after Tom Naylor’s first-half header knocked out League One leaders Portsmouth at the SMH Group Stadium.

Former Pompey midfielder Naylor headed the National League pacesetters into a round-two tie with mid-table League One side Leyton Orient, and Spireites assistant manager Webb thinks they were value for the 1-0 win in front of a sell-out crowd.

Chesterfield claimed a deserved lead just after the half-hour as Liam Mandeville curled in a free-kick and Naylor beat goalkeeper Will Norris to the ball to head home.

Chesterfield had chances in the second half to add to their lead but were rarely troubled by a Portsmouth side who lost Regan Poole and Tino Anjorin to injuries before the break.

Webb said: “We needed them to be a little bit off their game and we had to be on it and both things married up today.

“I’m going to be biased but I think the best team won today. Portsmouth made it a real tough cup tie with their supporters and how they played at times.

“Supporters want to see flair, they want to see wins. They want to see goals but they want to see passion.”

Portsmouth head coach John Mousinho admitted his side were second best.

He said: “We got punished by a very decent side. There were plenty of things I thought we did well up until half-time but I thought second half Chesterfield were all over us to be honest.

“We don’t want to overreact but sometimes the best thing to do is take a breath and we will review the game on the bus on the way home.

“Our quality was very poor in the second half. We got in some very good spots but the ball kept going behind for a goal kick.”