Eddie Howe made just one forced change to the side that beat Paris Saint-Germain 4-1 in the Champions League heading into the game with Elliot Anderson replacing the suspended Anthony Gordon on the left-wing.
West Ham took an early lead after Emerson caught out a charging Nick Pope before squaring the ball back to Tomas Soucek for a simple tap-in.
After an impressive run of form, The Magpies were lacking ideas in the opening 45 minutes at the London Stadium as they found themselves behind.
Here are the half-time player ratings from the match...
5. Dan Burn - 7
Closed Jarrod Bowen down well. Came close with a header from Kieran Trippier’s free-kick and forced a good save from Alphonse Areola in the second half. | Getty Images
6. Bruno Guimaraes - 7
Had a couple of decent moments in possession but was ultimately lucky to still be on the pitch after two dangerous challenges in quick succession early on. Played a lovely ball over the top to free Trippier to set-up Isak for Newcastle’s second goal. | AFP via Getty Images
7. Sean Longstaff - 6
Got around the pitch well and covered defensively when West Ham threatened to break away. Booked. | AFP via Getty Images
8. Sandro Tonali - 6
Struggled in possession in the first half but switched onto the right side of the midfield three in the second and was much improved though could have done better to stop West Ham’s late equaliser. | Getty Images