Sussex leg spinner Mushtaq Ahmed took 6-163 as the county forced Nottinghamshire to follow on in the Championship match at Horsham.

The Pakistani collected five of the last six wickets to fall as the visitors, replying to Sussex's mammoth 619-7 declared, slumped from 332-4 to 421 all out.

Despite a superb innings from Kevin Pietersen who was last out for 156 after hitting 17 fours and four sixes, Nottinghamshire started their second innings with a deficit of 198 The South African missed scoring the quickest hundred of the season by three balls, reaching the landmark off 75 deliveries as he shared in a fifth wicket stand of 193 in 26 overs with Bilal Shafayat for the fifth wicket.

Shafayat was leg before to Mushtaq for 71 and in the same over he removed Chris Read for a duck.

Robin Martin-Jenkins ended a partnership of 37 for the seventh wicket when he had Steve Elworthy caught behind before Mushtaq polished off the tail in the space of four overs.

James Kirtley had taken two wickets in the morning session but even Kirtley got some stick from Pietersen.

Batting again, Nottinghamshire had reached 12-0 in the fifth over, still needing 186 to make Sussex bat again.