The Fir Park side had to desperately defend the lead John Sutton's 20th minute goal gave them during the final 20 minutes, but had they converted one of the numerous chances they had while on top the game could have been killed off considerably earlier.
"I was delighted with the win especially the first half as we stopped them playing," he said.
"We knew a second goal would kill them off and their keeper has had a couple of terrific saves. However, while it is only 1-0 it gives the other team belief. And give credit to Thistle who made a right good go of it in the final 20 minutes."
The Well boss admitted to having a few anxious moments towards the end but was grateful for the clean sheet.
"After losing five goals in our last two games, it was pleasing to keep a clean sheet," he added. "That gives us a platform to build on and we have now won 50% of our games and with 1-0 wins."
It was a first goal of the season for Sutton, who was delighted to open his account.
"It is great to get the monkey off your back and get your first goal of the season," he said. "I scored 17 goals in my first spell at Motherwell and it gives me something to aim for. I also think I can create a good partnership with Henri Anier as we have only started once together."
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