LONDON — Baseball’s Hangover Effect isn’t limited to the defending champions, who more than halfway into their quest for a repeat still look a little wobbly. Here at the London Series on Sunday, the Game 2 crowd acted considerably more subdued than Saturday’s historic opener.

Perhaps that speaks to the common-sense difference of attending the second show as opposed to the first. Maybe it’s because Saturday’s night game allowed for more pre-partying than Sunday’s day game. Don’t forget, too, Prince Harry and his wife Meghan, Duchess of Sussex, didn’t show up at London Stadium on Sunday after gracing Saturday’s contest with their presence.

This felt more like a standard Yankees-Red Sox game: long, once again (4 hours and 24 minutes, a bit of a break from Saturday’s 4:42). Lead changes. And boisterous support for both sides.

The two pregame national anthems, American and British, proved a hit again, as did the mascot race — which Freddie Mercury won for a second straight day over King Henry VIII, Winston Churchill and the Loch Ness Monster.

Another nice touch? Between innings, the scoreboard held a quiz to test fans’ knowledge. A clip of the Red Sox’s Jackie Bradley Jr. squaring and turning his bat horizontally, punching the ball forward and moving over a teammate is called …

A: Sacrifice Bunt
B: Bump and Run
C: Small Hit

Americanized details like the Kiss Cam and Neil Diamond’s “Sweet Caroline,” which gets played late in every game at Fenway Park, were greeted warmly.

“The atmosphere was amazing,” Red Sox manager Alex Cora said.

It’s on the Cubs and Cardinals, next year — and Major League Baseball — to somehow make it even better when they return here.