They've been exceeding expectations all year, so regression to the mean is to be expected. Tatum may be hitting the wall, along with Ojeleye, both have had drops in numbers in January, which hurts the C's already shallow depth. Plus being the viewed as a legit team and having the best record in the East puts a target on their back, so it's no surprise that even the scrub teams try to bring their A game against them. So I'm not surprised at this happening, but I am a little surprised at the timing, as I really thought the London trip would be good for the team.
A stretch of 9 days with 1 game for an overseas trip that's actually a shorter trip than it is to play the West Coast teams. I imagine they had some team bonding over there, got some good practices in, while also getting some much needed R&R. So I thought they'd come out of the London trip strong and rejuvenated. Instead they came out of it flat, lethargic, and out of sync. A week off in the middle of the season should have been a blessing for this team.