Notts Outlaws missed an opportunity to secure a semi-final place in the Yorkshire Bank 40 as they slumped to a 38-run defeat against Worcestershire Royals at Trent Bridge.
Set a target of 221 in 37 overs after afternoon showers delayed the start, the home side were bowled out for 182 with James Taylor remaining unbeaten on 67.
Taylor was left with the lower order after Worcestershire reduced Notts to 83 for five - Moeen Ali claiming the wickets of Samit Patel, David Hussey and Riki Wessels on his way to figures of 3-28.
After being asked to bat first, Daryl Mitchell top-scored with 56 as the visitors posted 220 for eight.
Mitchell shared in an opening stand of 58 with Ali before pairing up with Alexei Kervezee, who hit a run-a-ball 31 in a second-wicket partnership worth 49.
Tom Fell added 25 and Thilan Samaraweera, who launched the only maximum of the evening, continued the momentum before being trapped lbw by Jake Ball for 38.
In a comical conclusion to the innings, Ross Whiteley survived three run-out attempts on his way to making six and Brett D'Oliveira was bowled by a Harry Gurney no-ball in the penultimate over.
Ajmal Shahzad claimed figures of 3-54, conceding a flurry of late runs as the lower order tried to scramble their way to a respectable total, and Harry Gurney collected two for 39.
Paceman Graeme Cessford, on his Worcestershire one-day debut, came under an early assault from both Michael Lumb and Alex Hales, who picked him off for five boundaries in his first two overs.
But Lumb then fell to Jack Shantry before Ali blew a hole in the batting card with three quick wickets, while Charlie Morris removed Hales for 31.
Taylor passed 50 for the fifth time in this year's competition but then lost partner Chris Read for 25.
A direct hit from point by D'Oliveira ran out Steven Mullaney, who received his county cap prior to the start, and the same fielder then caught Shahzad to give Cessford his maiden wicket at this level.
Morris delivered the final blow as he clean-bowled Gurney with four overs left unbowled.
While Worcestershire celebrated only their fourth win of the year, Nottinghamshire were left still needing victory over either Sussex Sharks or Kent Spitfires from their final two matches to reach the last four.