Pakistan coach Mickey Arthur admitted he was at a loss about the best way to stop Buttler following his 50-ball hundred against Pakistan at Southampton.
Buttler smashed six fours and nine sixes in his innings which propelled England to 373. In reply, Pakistan got to 361, falling short by 12 runs in a run-fest.
"Oh, I don't know how you bowl to him, I've just asked the bowlers actually. They didn't give me an answer either," Arthur said after the defeat.
"We'll sit down and analyse that and try to work out a plan.
"I don't think we're going to stop him, we've got to find a way to get him out. The longer he bats he's going to do some serious damage."
England captain Eoin Morgan had the best view in the ground while at the non-striker’s end. He struck an unbeaten 71 in a 162-run partnership with Buttler.
"He's very good. He really is," left-hander Morgan told Sky Sports.
"I was in prime position to see the whole innings and his freakish knocks seem to be getting closer and closer together, so that's a good sign for us moving forward.
"But he seems to have a gear that not many of us have. I certainly don't have it, but it's great to watch.
"He always seem to time his run really well, regardless of what time he comes in, he always seems to have enough balls to go on and bang a 50-ball hundred."
Pakistan and England will lock horns at Bristol on Tuesday.