West Ham's relief at earning a point was accompanied by the realization that this was a missed opportunity to push forward in the battle for European qualification.
Danny Ings scored his first goal of the season to deny Burnley a precious victory, but David Moyes will know that wasn't good enough. West Ham, who trailed 2-0 at half-time, will have to improve as they look to overcome a 1-0 deficit of the first leg of the Europa League round of 16 against Freiburg on Thursday. A lively recovery kept them seventh, but they cannot consider a home draw with Burnley, who remain 10 points behind Nottingham Forest in 17th, acceptable.
Those who remain adamant that Moyes should leave when his contract expires at the end of the season were given plenty of ammunition during a miserable first half. West Ham were flat, legs tired from their efforts in Germany three days earlier, and made no attempt to seize the initiative during the early stages. It was too easy for Burnleywho suffered a home defeat to Bournemouth last weekend, to feel the ball, gain confidence and push their hosts back before going ahead with David Fofana's third goal since joining on loan from Chelsea in January.
West Ham could hardly argue that it was against the run of play when Fofana sent a brilliant rising effort beyond Alphonse Areola after beating weak challenges from Kalvin Phillips and Nayef Aguerd. They sat Burnley, who didn't take long to find openings on the right flank, and it was hard to think of anyone in claret and blue who looked comfortable on the ball.
Nobody came away with any credit. Aguerd, replacing the rested Kurt Zouma in central defence, was too casual. Konstantinos Mavropanos, who ended the first period giving Burnley a second when he deflected Josh Cullen's harmless cross past Areola, struggled to complete simple tasks. James Ward-Prowse offered little boost at the top of West Ham's three-man midfield. Jarrod Bowen, who was isolated up front, continued to be caught offside.
Then there was Phillips and his quest to shake off the rust accumulated during his long spell in the Manchester City dugout. Replaced by Edson Álvarez, the midfielder seemed completely devoid of confidence and fitness in his third start since he arrived on loan. His passing was poor, he offered no momentum and it was no surprise when Moyes took him off at half-time. Gareth Southgate, who was at the London Stadium to watch Burnley's midfielders turn the tables on Phillips, has a big decision to make before naming his squad for England's friendlies against Brazil and Belgium this month.
Southgate will surely have noticed that West Ham improved after bringing in Alvarez for Phillips. The industrious Ward-Prowse also made way, Michail Antonio came on to provide a focal point in the attack, and Burnley fell behind early in the second half. Paquetá, more menacing after moving inside, was calm personified as he headed towards goal and slid a low shot past James Trafford.
It seemed inconceivable that Burnley, whose time-wasting antics infuriated the home fans, would hold out. They immediately chased a third, the lively Fofana shooting straight at Areola and Jacob Bruun Larsen's shot went wide, but the pressure at the other end was mounting. Paquetá had two opportunities and a deflection took Vladimir Coufal's cross to the crossbar. Bowen found Mohammed Kudus, who went wide after passing to Lorenz Assignon.
West Ham became frantic. Moyes threw on Ings and it looked like the striker had rescued a point against his former team when he beat Trafford from close range, only for the goal to be disallowed when Antonio was ruled offside after a lengthy VAR check.
The match reached eight minutes of added time and Burnley desperately tried to hold on. West Ham pressed on and were rewarded for their persistence when Kudus whipped in a cross from the left. Ings, still dangerous in the area, controlled with his chest, turned and shot into the far corner.
Both sides had time for a winner. Sander Berge, who survived a last-minute handball shout, and Josh Brownhill went close for Burnley. Antonio's shot went wide. Ings, having the time of his life, fired into the bar from 18 yards. He soon ran back to deny Burnley a chance to shoot. But the point was of little use to both sides.