LONDON — Gary Sanchez hasn’t decided if he will participate in the All-Star Game’s Home Run Derby on July 8.

“I have to talk to my wife and agent,’’ the Yankees catcher said Friday before the two-game London series this weekend against the Red Sox.

According to Sanchez, who participated in the 2017 event, MLB has contacted him about competing for the $1 million prize.

Sanchez participated in the 2017 event when he made his first All-Star team. Aaron Judge and Giancarlo Stanton have already said they wouldn’t take part and Luke Voit said he can’t wait to get asked.

Red Sox and AL All-Star manager Alex Cora was surprised none of his players were voted in as starters.

“The players don’t control that. The fans, they’re the ones that vote, and they voted for the guys that we have,” Cora said. “It’s a pretty good lineup, still, but I’m a little bit disappointed that none of our guys made it.But I did feel the players, I know how it goes and how much attention they pay. It wouldn’t surprise me if we three or four guys, five guys, on the team.”

If not needed in Saturday’s game, reliever Chad Green will make his eighth start of the season Sunday. The Yankees are 7-0 when Green “opens’’ a game, but he doesn’t care whether he starts or enters a game later.

“It’s not set in stone,’’ Green said of him starting. “That’s pretty normal. I will prepare to pitch [Saturday]. If we use an opener, I will be ready.’’

Though the Yankees hitters were salivating at the short distances to the London Stadium fences in center (385 feet) and the gaps (382), Green wasn’t intimidated by the dimensions.

“We play in Yankee Stadium with the short right field,’’ Green said. “If a fly ball goes to center field it gets out. It is what it is.’’

— Additional reporting by Ken Davidoff