The Clydesdale Bank 40 clash between Middlesex and Worcestershire at Uxbridge ended in dramatic circumstances, with both sides making 229 to leave the match tied.
Eoin Morgan sparkled with an unbeaten 120 off 80 balls as the hosts posted 229 for four from their 36 overs.
Worcestershire needed 24 off the final over - but former Middlesex man Ben Scott hit a four and three sixes off Steven Crook to leave the visitors needing two off the last ball.
Neil Dexter dived forward at mid-on and spilled a difficult catch - and Adam Scott scrambled through for a single to ensure the spoils were shared.
Morgan's innings was the highlight after they were put in and his 162-run stand between Eoin Morgan and Josh Davey (53no) was a record in one-day cricket for Middlesex's fifth wicket.
The hosts did not find the boundary until the sixth over, by which time Dawid Malan had edged Nick Harrison behind.
Joe Denly lifted Moeen Ali's third delivery over midwicket for six, but with Chris Rogers and Joe Denly falling in the space of four balls, the Panthers found themselves on 47 for three.
Rogers departed when he top-edged a sweep off Moeen to short fine leg, then Gareth Andrew squared up Denly to have him caught at slip for 27.
Four overs later, Dexter called Morgan through for a leg bye, but, having over-committed himself, the Middlesex skipper was beaten by Vikram Solanki's throw from backward point.
Morgan made amends by adding 162 in 20 overs with Davey.
The England left-hander picked Daryl Mitchell up over midwicket for a maximum and brought the hundred up for the hosts in the 23rd over with a four to wide long-on off Brett D'Oliveira.
Three overs later, Morgan posted a 45-ball half-century with a slog-swept six off Ali.
With 73 coming off the last six overs, Middlesex were in the ascendancy going into the interval.
Morgan pulled Harrison for two successive sixes over wide long-on in the 32nd over. Two overs later, the Irishman moved into the 90s with a six over midwicket off Andrew.
Morgan needed just 73 balls for his ninth one-day hundred, which he celebrated by lifting Jack Shantry back over his head for a maximum, although not before Davey had moved to his half-century in 53 deliveries.
In reply, Worcestershire slipped to 19-2 before Phil Hughes and Mitchell put the visitors back in contention with a third wicket stand of 96 in 18 overs.
Solanki had his middle stump flattened by Crook, who struck again when Ali holed out to deep midwicket.
Following a period of consolidation, Hughes came out of his shell in the 17th over by clubbing two successive fours off Davey.
The 23-year-old left-hander then lifted Gareth Berg over long-on and Tom Smith over straight midwicket prior to bringing up a run-a-ball half-century.
Hughes picked Smith up for another six, this time over wide long-on. But, two overs later, Toby Roland-Jones broke through Mitchell's defences to bowl the Royals' skipper for 35.
With Andrew hitting Smith for a straight six, Worcestershire needed 91 off the last 10 overs.
The visitors' push for the line lost appeared to have lost its impetus after Hughes (69) played on to Davey and Andrew skied a catch to Morgan at mid-on.
But Scott, who spent five seasons on the Middlesex staff, came back to haunt his former employers.