Sussex saw their promotion hopes falter when they slid to 111-4 on the opening morning of their Specsavers County Championship match against Derbyshire at Hove.

Derbyshire had chosen to field in overcast conditions and broke through in the sixth over when Phil Salt, playing well away from his body, fell to a juggling catch in the slips.

It was 47-2 in the ninth over when Tom Haines was caught low down at third slip by Matt Critchley and five overs later Luke Wells was caught down the leg-side by stand-in wicketkeeper Wayne Madsen off Ravi Rampaul. Just before lunch Michael Burgess edged Antonio Palladino to Madsen.

Madsen was keeping because Harvey Hosein had dislocated a finger in a pre-match warm-up and replacement Daryn Smit was still travelling to the match.

Sussex started the first of their last six Championship matches in second place in the second division, having won their previous three matches, two by an innings.