Yorkshire saw off Roses rival Lancashire by 47 runs in their Royal London One Day Cup opener, despite a superb century from Karl Brown at Old Trafford.
Batting first, Yorkshire posted an impressive 324-7 from their 50 overs with their top four, Adam Lyth (46), Alex Lees (66), Kane Williamson (70) and Andrew Gale (38), all making solid contributions and Tim Bresnan - who would go on to take two wickets - adding some late impetus with 32 from 18 balls.
After slumping to 57-3 in reply, Lancashire's hopes were pinned on Brown who hit nine fours and four sixes during a swashbuckling innings that kept his side in contention.
However, when he was bowled by Jack Brooks for 129 to leave his side 250-6, and needing a further 75 runs, the game was all but up for the hosts who were eventually bowled out for 277.
Derbyshire duo Wayne Madsen and Wes Durston both cracked centuries to inspire the Falcons to a thumping 136-run victory over Hampshire.
Captain Madsen made 138 - his maiden one-day hundred - and Durston blazed a career-best 134 as the pair shared a stunning 222-run partnership for the third wicket in Derbyshire’s 340-5 batting first.
The pair shared 30 boundaries and cleared the rope once each as Hampshire's bowlers toiled in ideal batting conditions.
The target always looked an ominous one and despite a strong start, Michael Carberry’s 55 ended up as the top-score for the Royals, who were bundled out for 204 in the 35th over as spinner David Wainwright helped himself to 4-34.
In Group B, Glamorgan’s one-day renaissance continued with a comfortable seven-wicket win over Middlesex at the Swalec Stadium.
The Panthers found themselves in huge trouble on 90-8 after being asked to bat first but rallied through an 84-run partnership from Neil Dexter (43 not out) and Steven Finn (42no) to post 174-3.
The total was still well below-par, though, and Glamorgan powered past it in just 36.2 overs thanks to half-centuries from openers Jim Allenby (70) and Jacques Rudolph (61).
Australian seamer Michael Hogan and David Lloyd, playing his first 50-over match, claimed three wickets apiece for the Welsh county.