Sudbury remained top of Marshall Hatchick Two Counties Championship Division One after a 166-run victory at Lakenheath on Saturday.
The visitors posted a score of 218-9 before bowling Lakenheath all out for 52 runs.
Hadleigh dropped to eighth in the table after a 124-run defeat at home to Coggeshall.
After bowling their opponents out for 213, Hadleigh were dismissed for just 89 runs.
In Division Two, Halstead stayed at the top of the table after a nine-wicket win at Ipswich and East Suffolk on Saturday.
Halstead bowled the hosts out for 90 runs and reached their target with the loss of one wicket.
In Division Three, Long Melford moved up to the top with a four-wicket victory at home to Woodbridge and Old Woodbridgians.
The visitors were bowled all out for 89 runs and won when they batted to 90-6.
Sudbury II dropped down to third following a four-wicket home defeat to Mildenhall II.
After being bowled all out for 100 runs, Mildenhall claimed success after batting to 103-6.