Steven Finn's eight-wicket haul inspired Middlesex to a 36-run win over Lancashire at Lord's and boosted the 2016 champions' hopes of survival.
Lancashire, chasing 221, were bowled out for 184 with Finn claiming 8-79.
Middlesex face fellow strugglers Somerset in their final game.
Haseeb Hameed retired hurt on 23 during the morning session after being struck on the hand by a James Harris delivery, and returned with his side nine wickets down, but did not add to his score.
The 20-year-old England opener, who was later revealed to have fractured a finger on his [url=http://www.authenticsabresprostore.com/authentic-39-dominik-hasek-jersey.ht... right hand, had on-field treatment but struggled to hold the bat and left the field for more than three hours.
Hameed faced another nine balls upon his return before last man Matt Parkinson became Finn's eighth and final wicket of the innings.
A broken finger ended Hameed's involvement in last winter's Test tour of India, and his latest injury comes two days after Middlesex seamer Toby Roland-Jones, tipped to make England's Ashes squad, went down with a lower back complaint.
Middlesex began the penultimate round of fixtures seventh in Division One, level on points with Somerset and one behind Yorkshire.
The 20 points collected from this game mean that, regardless of how their rivals perform in their [url=http://www.authenticsabresprostore.com/authentic-9-evander-kane-jersey.html... Evander Kane Womens Jersey ongoing matches, Middlesex will be safe if they win their final fixture of the season at Taunton, which starts on Monday.
Middlesex and England fast bowler Steven Finn:
"That partnership on the first day between Toby Roland-Jones and Ollie Rayner really set up the game for us to get a competitive total and what transpired to be the biggest score of the match.
"With only three bowlers it was important we all stood up. We stuck to our plans and that paid dividends.
"It was a big game for the club. We came into it really needing the points. And it was about time I did something [url=http://www.authenticsabresprostore.com/authentic-77-dmitry-kulikov-jersey.h... for the boys this season. I felt I bowled pretty consistently."
Lancashire captain Steven Croft:
"It's a disappointing result for us. We came here still looking for second spot. We can't win it but we still want to be second best and we never like losing.
"Scoring 221 in the last innings was a tough ask on that pitch. And I don't think we got the [img]http://www.texansonlineofficialstore.com/images/products/nike_nfl_jerseys/n... rub of the green in terms of the surface or the decisions.
"It was an uphill task. We have given it a right good go though, so losing was tough to take. But it was a good game for the fans."