Teenage defender Dean Huijsen becomes Bournemouth's youngest defender first division goalscorer in leading his team to victory over Tottenham at the Vitality Stadium.
Andoni Iraola's Cherries had defeated title contenders Arsenal and Manchester City in two of their previous three home games.
The Spanish under-21 international, aged 19 years and 235 days, secured another triumph for the club with a 17th-minute winner as inconsistent Spurs suffered another setback in an inconsistent season so far.
Bournemouth overtook Ange Postecoglou's visitors to ninth position after a deserved success that should have been more comfortable.
Ryan Christie hit the woodwork and the impressive hosts failed to capitalize on a number of chances, while a toothless Tottenham side created little in attack. Inconsistent spurs Defeated champion Manchester City 4-0 in their previous away game, but that was their only win in five games in all competitions before the trip to Dorset.
Dominic Solanke was fit to face his former club after missing Sunday's 1-1 draw at home to Fulham due to illness, and captain Son Heung-min went to the bench as part of three changes. The north London club started with the lead and, after the retired Dejan Kulusevski shot straight at goalkeeper Kepa Arrizabalaga, Solanke's shot went wide after being released by stand-in captain James Maddison. Bournemouth looked lively on the counterattack and took the lead.
Spurs goalkeeper Fraser Forster initially made a good save to deny Evanilson following a hesitation from Radu Dragusin, but from the resulting corner taken by Marcus Tavernier, Huijsen, a summer signing from Juventus, arrived unmarked at the second stick to nod home.
Tavernier had the ball in the net 14 minutes after the first goal, but was clearly offside, before seeing a point-blank header from Milos Kerkez's cross deflected away by Forster. Despite Tottenham's shortcomings, Postecoglou opted not to make changes at half-time.
His team got back on the front foot, although they still looked susceptible at half-time, with Justin Kluivert, who scored a penalty hat-trick in Saturday's 4-2 win over Wolves, came close to doubling Bournemouth's lead .
Son replaced Pape Sarr in the 57th minute and immediately increased the tempo of Tottenham's game. The South Korean international headed home the rebound two minutes after being introduced following Kulusevski's initial effort, but was denied by an offside flag, before sliding towards Maddison, who took a narrow deflection.
Fellow substitute Pedro Porro tested Kepa with a powerful low shot, before Christie hit the base of the left post at the other end.
Tottenham survived a major scare 18 minutes from time when Evanilson's close-range shot was disallowed for offside after a risky pass from Forster to Kulusevski was intercepted.
Bournemouth should have put the game beyond Spurs, with Tavernier and substitute Dango Ouattara wasting excellent chances by shooting over the top. The misses ensured plenty of tension during the six minutes of stoppage time, but in the end they mattered little as Spurs were unable to make a meaningful attempt to gain a point.