Opener Ademola Onikoyi's unbeaten 68 propelled Nigeria past Tanzania for a six-wicket win at St Martin. In a match reduced to 28 overs a side, Tanzania chose to bat first but struggled to reach 115 for 8. Sesan Adedeji was the main source of disruption with the ball, taking 3 for 14 in five overs.
Kassim Nassoro top-scored with 30 for Tanzania and struck twice with the ball during the Nigeria chase but couldn't remove Onekoyi. The right-hander brought up his 50 in 61 balls on the way to victory achieved with 19 balls to spare.
Guernsey claimed victory by five runs on the Duckworth-Lewis method after their 26-over chase of Vanuatu's 127 for 6 was halted by rain at 105 for 6 after 21 overs at St Clement. Opener Matthew Stokes top-scored in the Jersey chase with 34 after having taken 2 for 23 in the field. Vanuatu captain Andrew Mansale followed up his 27 by taking 4 for 19 to put Guernsey in trouble at 81 for 6 in the 16th over, but a steady 24-run stand between Ben Ferbrache and Thomas Kirk ensured Guernsey were ahead of the par score when the players came off.
Vanuatu had been sent in and opener Jonathon Dunn anchored a methodical innings, making 42 off 57 before being dismissed in the 23rd over with the score on 103 for 4. David Hooper and Thomas Kirk also took two wickets apiece for Guernsey.
The feature game of the day at St Saviour between hosts Jersey and World T20 qualifiers Oman ended with no result after just nine overs of the Jersey chase could be completed due to persistent rain. The two sides will restart the game from scratch on Monday's reserve day.
The match began after a five-hour rain delay and was reduced to 23 overs a side with Jersey sending in Oman and restricting them to 132 for 9. Oman initially raced out to a superb start behind Zeeshan Maqsood, who made a streaky 29 off 14 balls before one too many top-edged pulls finally found Cornelis Bodenstein at deep square leg off Charles Perchard.
Oman were looking good at 71 for 2 in the 12th over before offspinner Rhys Palmer disrupted the innings with the first of three wickets on the day. To the last ball of his first over, he induced a mistimed drive from Vaibhav Wategaonkar which was taken at mid-on by Anthony Hawkins-Kay for 26. Jatinder Singh was Palmer's second victim, driving to Jonty Jenner at mid-off for 24 in the 18th before Mehran Khan's brief assault on Palmer ended with a skied slog taken by a diving Ben Stevens charging in from point for 14 to make it 114 for 6 after 20.
Brought back at the death, Perchard struck two more times to finish with 3 for 17. He claimed Rajesh Ranpura to a diving Peter Gough at midwicket for 3 before Aamir Kaleem was stumped for 10 by Jake Dunford standing up to Perchard's medium pace.
In reply, Jersey got off to a confident start behind Gough and Jenner, who added 46 for the first wicket. Jenner made 25 off 23 balls before he was trapped prodding forward against left-arm spinner Aamir Kaleem to end the eighth over. The rain became progressively heavier over the course of the next over before the umpires took the players off. It means both Jersey and Oman now face the prospect of playing five times in five days due to the scheduled rest day on Monday being used as a reserve day to replay the original encounter as a fresh 50-over game under WCL rules.
Peter Della Penna is ESPNcricinfo's USA correspondent. @PeterDellaPenna