Adam Dennison returns to the Northern Knights side for today's opening Inter-Provincial Cup match against North West Warriors at Stormont (10.45am).
The Waringstown opening batsman, fresh from scoring 75 in Saturday's Gallagher Challenge Cup game against Woodvale, replaces his club captain Greg Thompson, who is unavailable, while James Cameron-Dow comes into the 12-man squad for Peter Eakin, who drops out in the other change from the T20 game on Friday.
Niall O'Brien is back in the North West Warriors side to keep their quota of six Ireland internationals, with Andy Britton unavailable. Brigade team-mate David Barr takes his place in the only other change to the team that made it two wins out of two in the T20 Trophy on Friday night against Munster Reds.
It is three in a row for Civil Service North in the Lagan Valley Twenty20 Cup after their seven wickets victory over holders Waringstown yesterday.
Set 200 to win, they eased to their target with an over to spare after Mark Ellison celebrated his call-up to the Northern Knights squad with 97 off 46 balls, hitting 10 fours and five sixes.
Ironically, Ellison has been picked for the three-day Championship game against Leinster Lightning at Comber, starting tomorrow, rather than today's 50 overs contest.
Olly Metcalfe's 73 ensured Instonians won the other Group A game against Armagh, while North Down moved to the top of Group B with a 66 runs victory over Carrickfergus.
Muckamore captain Neil Gill has been reported by umpires Sam Alexander and Trevor Steen following his side's defeat to Holywood in the one upset in the first round of the Challenge Cup.
Gill was given out leg before, to a ball that hit him high on his thigh pad, with Muckamore still needing 55 from the final eight overs.
In the heat of the moment, Gill walked up the pitch and confronted Steen before leaving the field, although his helmet and bat reached the boundary before he did.
To his credit, Gill did shake hands with both umpires at the end of the game but overall it was a poor day for the umpires who angered both sides with their decisions, Paddy Beverland claiming his bat was nowhere near the ball when given out caught behind in the first over of the match and a no-ball call having to be revoked - it was actually a dead ball - after the ball slipped out of the bowler's hand in his delivery stride.
Holywood, though, deserved their win with Mark Adair's 88 comfortably the top score of the day, and although the Knights bowler didn't take a wicket, Andrew Haire, Adam Gardiner, Mark Best and skipper Jordan Wilson more than made up for it, with the umpires having to give only three decisions.
It was just the sixth time a Premier League club has lost to a team from a lower division this decade and Muckamore, unsurprisingly as they have yo-yoed between the two sections, have been involved in four of them, winning one and losing three.Elsewhere, there were huge wins for the top flight sides with Waringstown beating Woodvale by 245 runs - James Hall (109) and Dennison putting on 168 for the first wicket - and North Down (Daniel Graham 108 out of 315) were 215 runs too good for Donaghcloney Mill.
Instonians beat Cregagh (119 all out) by nine wickets with Nikolai Smith and Olly Metcalfe both finishing 55 not out from 55 balls and holders CIYMS beat Armagh (102 all out) by seven wickets.
Derriaghy won the derby against Lisburn by two wickets thanks to an unbeaten 28-run partnership between Adam Jamison and Curtis Moorhead after they had lost seven wickets for 19 runs, and Downpatrick passed Bangor's 235 with two wickets and two overs to spare, Craig Boultwood seeing them home with 87 not out.
The quarter-final draw is on Wednesday evening.
Northern Knights: S Getkate (capt), J Cameron-Dow, A Dennison, G Kidd, G McCarter, J McCollum, J Mulder, N Rock, J Shannon, A Shields, Nik Smith, H Tector.
North West Warriors: A McBrine (capt), R Allen, D Barr, A Gillespie, G Kennedy, R Macbeth, N O'Brien, W Porterfield, D Rankin, D Scanlon, S Thompson, C Young.
T20 CUP SCORES
The Lawn: Waringstown 199-7 (G Thompson 66, J Hall 36, J McCollum 32, A Dennison 31; B Adair 2-23, M Topping 2-26, A Malan 2-48) Civil Service North 203-3 (M Ellison 97, A Malan 42). CSN won by 7 wickets
The Mall: Armagh 121-9 (S Wilson 39 not out, J Rogers 35, A Hoey 25; A White 3-22, S Bunting 2-21) Instonians 122-6 (19 overs, O Metcalfe 73, A White 22; H Doyle 2-11, N Gelston 2-15). Instonians won by 4 wickets.
The Green: North Down 174-5 (P Eakin 55, R Haire 49 not out, A Shields 29, R Pretorius 26) Carrickfergus 108-9 (P Eakin 3-16, S Nelson 2-13). North Down won by 66 runs.