The Reds suffered Premier League defeat for the first time in 2026, with Will Osula’s 90th-minute strike bringing to an end our 11-match unbeaten run.
Lammens echoed Michael Carrick’s comments, in labelling it a disenchanting night on Tyneside.
“Yeah, it's a really big disappointment, I think,” Senne said. “We knew it was going to be difficult today, especially away here and the manager warned us.
“I think, in the first half, we weren’t at our best but then, heading into half-time, with a pretty good feeling after scoring that goal in the last minute. Against 10 men, we had a pretty good feeling.