City suffered their first Premier League defeat in 33 games, a run stretching back to December 6, 2023 when they were beaten at Aston Villa. Guardiola's side face Sporting CP in the Champions League on Tuesday and then are back on the south coast next Saturday to face Brighton.
Walker added: "The last 10 minutes is how we should've played the whole game, with the emotion, the togetherness and the spirit to go and win the game. But they've caught us on a couple of good counter-attacking plays, Eddie [Ederson] has made some fantastic saves. We take our defeats on the chin as we do our wins, and we move on."