MILWAUKEE — Liam Hendriks last week expressed displeasure that he wasn’t getting enough high-leverage opportunities out of the Red Sox bullpen.

On Tuesday night, he was given a big one. It did not go well.

Hendriks took the mound in the bottom of the 10th inning at American Family Field an inning after Aroldis Chapman had suffered his first blown save of the season, and with the Sox tied 1-1 with the Milwaukee Brewers.

But not for long. A single and a walk loaded the bases and after Hendriks had retired the dangerous William Contreras on a flyout to shallow center, he was torched for a walkoff grand slam by Christian Yelich, handing the Brewers a 5-1 victory.

To his credit, Hendriks was quickly and directly accountable.

“It’s not good,” said a downcast Hendriks. “Obviously, we pitched a hell of a game and for me, at the end of that, letting the entire group down, that stings for me a lot — especially the pitches they hit. They were mistake pitches, pitches that needed to be in different locations.

“At the end of the way, these guys battled out there no matter what. We were up 1-0 (going into the bottom of the ninth) and when we get to extras, I need to handle that a little bit better.”

The Red Sox brought in Ceddanne Rafaela as an extra infielder and when Hendriks induced a weak pop-up to shallow center from William Contreras that Jarren Duran raced in to catch, Hendriks had the feeling there was a pathway out of the mess.

“Anytime you’ve got a chance for a double play to get you out of the inning, it makes things a lot easier,” said Hendriks. “But even then, I had him in a count where (Contreras) shouldn’t have been able to put the ball in play. And I didn’t execute that.

“I gave myself enough chances to get out of it, but I didn’t execute the ones I needed to.”

The Red Sox have suffered a litany of one-run losses of late, and have asked a lot of their bullpen. For five innings, the relievers were nearly flawless, which made it all the more difficult for Hendriks that the 10th got away from him.

“This group of guys out there have been through the ringer,” said Hendriks. “They’ve been pitching a lot. The amount of close games we’ve had means they’re constantly out there, constantly have to be ready just in case. It definitely wears you down.

“They battled. They threw, what, (five) fantastic innings until I decided to go out there and ruin it.”

Hendriks diagnosed the problem as one of execution, where he was either yanking pitches or having pitches run to his arm side.

“Right now, I was either (over the) middle or (out of the strike zone),” he lamented, “and that’s just not a way to live.”