Ross Dougherty scored an unbeaten double hundred as Newbuildings overcame a shaky start to beat competition debutants Letterkenny by a record margin at Foyleview Arena. last season's beaten finalists were in early trouble losing two wickets in the first over to Wasiq Riaz (4-60) and later stumbling at 47 for 4, before recovering in spectacular fashion.

'Doc' hit 25 fours and 7 sixes in his 201 not out from 134 balls, sharing a 5th wicket stand of 259 in 29 overs with South African professional Hanu Viljoen. The latter hit 106 from 100 balls (10 fours, 4 sixes), while skipper Gareth McKeegan (49*) added an unbroken 116 for the 7th wicket with Dougherty as Newbuildings made 426 for 6.

The chase was a forlorn one as the Donegal side were skittled for 40 - five wickets for Trent McKeegan and two apiece for Charlie Downey and Viljoen sealed the 386-run win - not surprisingly a record margin for the competition.

Strabane's Pakistan professional Nasir Nawaz announced himself on the North West stage with a brilliant unbeaten 119 to lead his team to a resounding 8-wicket win at Bready in a repeat of the 1996 final.

Chasing 204, Nawaz dominated an opening stand of 48 with Kevin Gallagher (2) and then added a further 120 with skipper Aaron Gillespie (41) to all but seal the win. Nawaz hit 11 fours and 5 sixes in his 104-ball knock.

Earlier, Ryan Gallagher picked up three wickets, with two apiece for Usman Azhar and Andrew Mullen. Irosh's 55 was the pick of the Bready innings, while Jamie Magee (38) and David Rankin (28) got starts.

Game of the day was at Killyclooney, where the hosts lost a last-over thriller by just two runs in a high-scoring match.

Ardmore skipper Rachit Gaur dominated their total of 274 for 9, making an undefeated 141 from 124 balls - 14 fours and 7 sixes, while there were vital runs down the order from Sabin Babu (44). Jordan Nelson (3-47) was the pick of the home side's attack.

The chase got off to a flier with Blayde Capell (81) and William Finlay adding 143 in 21 overs to get them past halfway with all 10 wickets on board. Capell struck 7 fours and 4 sixes in his 81 from 74 balls before becoking the first of four wickets from Dharm Singh (4-41).

Finlay got stuck in the nervous 90's and after almost being run out on 99 when his partner sent him back, he edged to short third man.

You got the feeling that was the decisive moment but Killyclooney kept edging closer as the contest ebbed and flowed.

The last wicket pair came together with 23 needed and thanks to a few boundaries and a dropped catch they reduced that to 3 off the last over. Rachit though had the final say, bowling Wallace via his pads to clinch a dramatic win for the Bleachgreen side.

Eglinton romped into the quarter-finals with a 9-wicket demolition of St Johnston. Four wickets for Mike Erlank saw the Saints falter to 128 all out having been at one stage 112 for 3 with runs for Jack Macbeth (34), Jacob Maroske (28), and David Lapsley (27).

The modest target was knocked off with the minimum of fuss as Liam Doherty and Tommy Orr shared an opening stand of 126 in just 15 overs. Doherty hit 5 fours and 5 sixes in his 71 not out from 48 balls, while Orr's 44 came at an even pace (4 fours, 2 sixes). A consolation wicket with just 3 runs needed didn't take the gloss of what was a superb all-round effort from the villagers.

Holders Fox Lodge were the first side through to the last eight as they overcame what looked a tricky away day tie at Bonds Glen. The hosts were soon deep in the mire at 40 for 7, with Adam Walker (4-20) and Ramey Harpur (3-23) doing the damage. Kyle Moore (28) struck a few lusty blows but three wickets for skipper Aaron Heywood saw a chase of just 96.

Fox Lodge lost two early wickets but a rapid 53 from Gayan Maneeshan, who cleared the ropes five times and also hit four fours in his 29-ball innings, saw him and Jason Milligan (28*) add 89 in 8 overs as the win was secured before the end of the first powerplay.

Gihan Cloete arrivd with a big reputation and showed just why as he made a brilliant 152 to help Glendermott chase 255 to win by seven wickets at Coleraine. He and Alan Johnson came together at 60 for 3 and proceeded to add an unbroken fourth wicket stand of 195 to clinch a fanous win. Cloete hit 17 fours and 5 sixes, while Johnson proved the perfect foil in an unbeaten 59.

Earlier, Matthew Hutchinson fell just three short of a deserved century as he made 97 sharing stands of 107 for the second wicket with Marcus Poskitt (74; 14 fours, 1 si) and 82 for the 3rd with Ravi Karunaratne (46; 3 fours, 4 sixes) as the Bannsiders posted what looked a very decent 254 for 7.

Scott Macbeth and Ifty Hussain were in the runs and wickets as Brigade overcame Ballyspallen by 5 wickets at Bridge Park. Macbeth took 4 for 30, while Hussain claimed 3-29 as 'Spallen were dismissed for 105 - Demith Perera making 35. Josh Wilson also picked up two wickets against hiss former side. Hussain top-scored with 29, while Macbeth's unbeaten 23 ensured that the Beechgrove side go into the hat on Monday for the quarter-final draw.

Donemana ran out convincing winners in the Tyrone derby as they overcame Burndennett by 136 runs at The Holm. A solid middle-order batting display spearheaded by 54 from Levi Dougherty, who hit four 6s in his 54, saw Donemana make 268 - runs too for Kyle Dougherty (49), Gary McClintock 45, and 30's for William McClintock and Dwayne McGerrigle.

Burndennett's reply never really got going with early wickets for Gary McClintock and William McBrine, while DJ Dougherty also picked up a trio as they were bowled out for 132 - Andrew Barr's 37 the highlight.

The draw for the quarter-finals of the Senior Cup plus the Sammy Jeffrey Cup will take place on Monday.

The Senior Cup will be seeded with the four top seeds - Newbuildings, Brigade, Eglinton and Fox Lodge in one pot and Donemana, Ardmore, Glendermott, and Strabane in the other.