Tottenham remain in fifth place with 53 points from 31 games, three behind Manchester United and Newcastle United who have played 29 and 30 games respectively. Spurs play at Newcastle next weekend and also still have to face Manchester United later this month.
Bournemouth’s survival prospects are now looking much rosier as they have 33 points, six more than third-from-bottom Nottingham Forest.
“It is a really tough day today because we didn’t achieve what we wanted,” Tottenham’s interim manager Cristian Stellini said.
“If Richarlison scores that opportunity we are probably here to enjoy a moment. But now we do not enjoy because we allowed them to score three goals.”
Bournemouth have now won three of their last four league games and are pulling away from trouble.
“We try not to get carried away,” manager Gary O’Neil said. “We will enjoy this and then it will be gone and put into the memory banks for the fans to enjoy.
“There is a huge week next week and we need to be ready.”
Disgruntled Tottenham fans had been given a tonic by Newcastle’s loss, and when Son slotted in from Ivan Perisic’s cutback, the mood was buoyant in the weak April sunshine.
Son was denied a second goal by a fingertip save from Neto, but Bournemouth always looked a threat, with Marcus Tavernier forcing a superb save from Lloris.
From a position of strength, Tottenham threw away the initiative as Porro gave away the ball and Solanke played a pass to Vina who coolly lifted a shot over Lloris.
Tottenham were forced into a substitution with injured defender Clement Lenglet being replaced by Davinson Sanchez, and it was Sanchez who had an inadvertent hand in Bournemouth’s second goal early in the second half.
The defender’s attempted tackle merely played the ball into the path of Solanke who finished well.
Dutch forward Danjuma, given precious little time to impress since joining Tottenham on loan from Villarreal, brought the stadium to life with his first league goal for the club, but the mood was soon to turn flat for the home faithful.