West Brom boss Tony Pulis took "some responsibility" for the 3-0 defeat by Tottenham, saying he was distracted by the closure of the transfer window
A Christian Eriksen free-kick and Harry Kane's double gave Spurs victory against a lacklustre Baggies side.
Pulis said he had been "working really hard" to try and bring players in ahead of Monday's transfer deadline.
"I have to look at myself and say 'have I given it as much as I could have given it this week?'" he added.
"Or have there been other things that have pulled me away from the most important thing - getting the players prepared for a game on Saturday?"
Defeat was West Brom's first in five matches under Pulis and he acknowledged he was "part of what happened".
|All good things come to an end...|
|Christian Eriksen's goal was the first time West Brom had conceded in 266 minutes of Premier League action.|
The former Stoke and Crystal Palace manager made his first signing for the Baggies this week, bringing in Wigan midfielder Calum McManaman for £4.75m.
And Pulis said he hoped to make a couple more signings before the transfer window closes at 23:00 GMT on Monday.
"We are trying and we need to fill one or two areas - we have to, to give ourselves a chance in the last 15 games because it's very, very tight," he said.
"There are lots of clubs down there fighting for their lives and we need one or two."
West Brom are 15th in the table, three points clear of the relegation zone.
Pulis said conceding twice in the opening 16 minutes against Spurs left his side with too much to do.
"I thought we started very flat and flaky in lots of respects," he added. "Against the top teams, if you're nor right on it, they punish you."