Market Deeping 2nd secured a four-wicket win at Long Sutton with two overs to spare.
The toss proved vital in what turned out to be a close encounter at the Paradise Field.
Being asked to bat first on a damp, sticky track was always going to be hard work and so it proved.
Early wickets fell thanks to some tight bowling from the Deeping openers.
Skipper Phil Barnes stood firm at the other end and tried his best to rotate the strike.
Wickets fell but Dan Oldfield and Barry Stanway both offered Barnes support with some lusty blows.
Barnes looked to up the tempo but it proved one shot too many as he departed for a stern 47 from 122 balls.
Deeping thought they had the innings wrapped up but Jake Burton and Craig Harron saw out the remaining overs and get Sutton to 145-9.
With the wicket drying out it was always going to get easier to bat on.
Deeping got off to a flying start against the quicker bowlers and it looked like the game would be quickly over.
But Burton was introduced into the attack and quickly removed the Deeping skipper thanks to a sharp stumping from Adam Wright.
Joe Broomfield bowled with incredible control at the other end and started to dry the runs up, backed up by some great fielding, especially from Luke Barnes.
But with Broomfield and Burton bowled out, part-time seamer Matt Bull was introduced and began to put Deeping under pressure – taking 3-18 from seven overs.
With the wickets tumbling the overs kept ticking by, but it was too little too late as Deeping reached the finish line – Ryan Bainborough making 51.
Meanwhile, Spalding’s early challenge for the title continued with an eight-wicket victory over Billingborough.
Bourne 2nd are third after restricting Stamford Town to 162-8 and going on to win by five wickets with Joe Evison hitting an unbeaten 72.
Spalding also head the Division One table with their 2nd XI beating Grantham 3rd. Rob Noble hit 59 for the leaders.
Moulton Harrox are third after a 30-run victory over Timberland.
In Division Two, Graves Park beat Pinchbeck by two wickets – Martin Hodgson taking five wickets and Jack Ashton hitting 50.
Long Sutton 2nd beat Belton Park 2nd by four wickets to go fourth.
In the League Cup Group C, Baston won through to the semi-finals by beating Grantham 4th.
Woodhall Spa 2nd 90 (M Troops 5-43), Boston 2nd 91-2.
Stamford Town 162-8, Bourne 2nd 164-5 (J Evison 72no).
Grantham 2nd 237-6 (Johnson 57no), Belton Park 75 (Ashley 6-23).
Long Sutton 145-9, Market Deeping 2nd 146-5 (Bainborough 51).
Billingborough 145, Spalding 146-2.
Spalding 2nd 177-8 (Noble 59, Wing 5-23), Grantham 3rd 72.
Billingborough 2nd 142 (Pilgrim 52), Heckington 97.
Freiston 270-8 (Ilyas 84, Moeed 67), Skegness 2nd 136.
Moulton Harrox 225-9, Timberland 195.
Pinchbeck 138 (Hodgson 5-20), Graves Park 139-8 (Ashton 50).
Burgh & District 72, Boston 3rd 73-1.
Belton Park 2nd 113, Long Sutton 2nd 114-6.
Baston 202-6, Grantham 4th 104.