Leyton Orient boss Russell Slade called on his side to improve going into their final three games after seeing them sink to a 2-1 defeat at Crawley Town.
Inconsistencies have plagued the O's in recent weeks and they have won only one of their last seven matches.
Hopes were high that they had found some momentum after a thumping 5-1 home success over Gillingham last Saturday, but Orient contributed to their own downfall by conceding two poor goals.
A right-footed toe-poke by Chris Dagnall shortly before the interval cancelled out Gwion Edwards's 26th-minute opener, but Crawley clinched their third successive victory 20 minutes from time when Andy Drury rose unchallenged to head home Mike Jones' cross.
Slade said: "We accept that it is the play-offs for us now and we have to improve and do better.
"We have to perform to a high standard if we are to go up."
Slade said he felt he would need to have another look at the goals his side conceded, but his first impressions were that they were poor ones.
He added: "We're very disappointed about both goals, they didn't look good I have to say.
"The second one looked as though we weren't marking at all."
The O's have failed to take a point in four meetings with Crawley and Slade felt the game could have gone either way.
"Fair play to Crawley, they created a bit, but on another day it could have been a draw or a win for us," he said.
"Now we are looking forward to receiving Wolves on Monday. They are a top team for a reason, the numbers don't lie and it will be the perfect measure for us."
Crawley boss John Gregory praised his men for the way they have responded to a busy fixture schedule with straight wins - having previously lost six on the trot.
The former Aston Villa manager said: "This was our third game in seven days and I'm proud of my boys.
"Playing two games in a week has been a monumental ask and I'm so proud of them.
"I have 12 players out of contract and they are an incredible bunch to work with. That was very much in evidence."
Gregory heaped special praise on central defender Kyle McFadzean, who ensured Crawley maximum points with a vital goal-line clearance to deny David Mooney an equalizer in stoppage time.
Gregory said: "Kyle is my John Terry and I am exceptionally proud of him.
"Chelsea are the old Chelsea with John Terry standing firm, and in the last 15 minutes Orient couldn't score with Kyle and our defence outstanding."
Gregory promises his side will be going "flat out" at Notts County on Monday and let it be known that his men would "not be doing any favours for anyone."
He added: "We will be at it on Monday and will be going out to win.
"We are good professionals and we will be going about our jobs.
"We have kicked on with three wins on the trot but it won't be easy.
"There is not a lot of grass on the pitch at Notts County, but we will be going flat out to win."