If you put a heart rate monitor on either captain from City or Guyra towards the end of Saturday's match, the reading would have been off the charts.
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The clash came down to the wire after both teams struggled with the bat at times during the match.
Guyra hadn't taken the field since December 14 and were coming up against a first-placed City team who hadn't lost since round one.
City won the toss and chose to bat first and Guyra's evergreen Mitch Woods got them on the front foot early, snaring the crucial wicket of the competition's leading run-scorer Kyle Taylor, leg-before-wicket for two.
BJ Cameron chimed in for a wicket, dismissing Andy Sawyer for four before Woods snagged his second in City opener Ash Clee for 25.
Woods had his third shortly after when he sent Ben Pears for a duck and then Tyson Burey trapped Callum McKercher lbw.
Experienced City pair in skipper Karl Triebe and Andrew Skinner then entered the frame to settle the innings.
Guyra's Matt Finlay claimed his first wicket for the match when Triebe was caught on 35.
Finlay then took the wickets of Arran Kenna and Simon Stubbs.
Joey Ryan managed his first wicket in first grade when Skinner was caught on 32 and had his second with Chris Wild for Guyra to dismiss City for 139.
"It was crucial getting Kyle early we worked hard on that," Guyra captain Charlie White said.
"We knew we still had to get nine wickets and we stuck at it.
"A few errors in the field again but we haven't played for seven weeks so I was expecting to be rusty in the field and that is how it turned out but I will take the win."
White and Shane Wolfenden opened the batting for Guyra and put on an partnership of 50.
Wolfenden was the first to go, caught off Triebe's bowling for 29 and White went shortly after, bowled by Stubbs for 20.
Ben Jackson added 14 with Stubbs doing the damage and BJ Cameron stood up with 24 before Kenna snagged his wicket.
Matt Finlay was bowled by Wild and then Guyra suffered a collapse.
Wild claimed another and Triebe two more before Woods and Jason Campbell settled at the crease.
With two wickets in hand and 19 runs to get, the experienced duo managed to get their side across the line, Woods with 12 not out and Campbell four not out.
White was pretty happy to take the win but lamented they need to improve their batting.
"Two old dogs got us home," White said.
"Collapsed a little, we just need to value our wicket, that is all it is.
"It was a very lucky win, it was close, it was a good game.
"We generally do play good games with City so I am happy.
"We know we can beat them so there is no reason why we can't do it again."
In the other match of the round, Easts batsman Cody Graham ran riot with a 178-run stand in his side's win over Ex-Services.
Graham belted 15 sixes and 11 fours as Easts made 9-407 from their 45 overs.
In reply, Servies batted out their overs but fell short, finishing on 8-222.
John McKay was their top run-scorer with 83.