Gosport lost 2-0 to Bournemouth Poppies, who stunned them with a close-range Ryan Lucas header on 33 minutes and an 88th-minute breakaway goal by Lewis Till.
To add to Borough's headache, eight-goal marksman Neil Scammell hobbled off after colliding with an advertising hoarding.
Fareham chalked up their second 3-0 victory of the Bank Holiday weekend at the expense of Bemerton at Cams Alders.
After missing a stack of first-half chances, they made amends through Floyd Hamoudu, James Lacey and a superb individual effort from Abdou Manneh.
"It was a fantastic team performance and Floyd really stood out today," said manager Jon Gittens.
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