Nottinghamshire won a thriller against Surrey at The Oval to take control of the Rothesay County Championship race.
Defending champions Surrey, chasing 315 to win, were bowled out for 294 to slip to a first home defeat of the season.
Josh Tongue took the final three wickets including last man Tom Lawes, who made 33 before holing out to Ben Slater on the boundary, to finish with five for 100.
Nottinghamshire, who were deducted one point for a slow over rate, are 14 points clear at the top ahead of their final match against Warwickshire at Trent Bridge, while Surrey visit Hampshire.
Somerset’s title hopes came to an end after they came up short in a draw with Hampshire.
Archie Vaughan took six for 96 but Hampshire, who had been forced to follow on, held out to finish on 201 for