Allardyce disappointed by draw
West Ham manager Sam Allardyce admitted it was a "sickener" for his side not to have held on for what would have been a memorable cup scalp.
Robin van Persie came off the bench to net a sublime equaliser in stoppage time against the Hammers as United salvaged a 2-2 draw from a thrilling FA Cup third-round tie at Upton Park.
"It was a great performance from the lads and it is a real shame they didn't get us through at the first time of asking," Allardyce said.
"But we are still in the draw after a fantastic performance on the back of a very good [league] win over Norwich.
"I hope our bad run is now over and, if we continue to keep performances like this going, we will continue to get results."
Brazilian side Cruzeiro claim forward Wellington Paulista will join West Ham on a loan deal, which would further bolster Allardyce's attacking options following the move for Marouane Chamakh on a six-month contract from Arsenal.
"We are searching for players, but at this time of year an agent will ring me up, or he will contact the chairman and the next minute they ring the papers and say we are going to buy someone," said Allardyce.
"That happens throughout the window so until we have got one having a medical or nearly clinched then we will be linked with another 150 players between now and January 31."