Senegalese star Demba Ba struck a brace to steer West Ham United towards a three-goal comeback in his first start for Avram Grant's side since arriving from Bundesliga outfit Hoffenheim in January.
The Hammers were three goals down at the interval but were spurred on by Ba's double to force a dramatic tie by the 83rd minute.
The former Hoffenheim striker arrived at West Ham last month after scoring 37 goals in his three-and-a-half-year stay in the Bundesliga.
He spent much of last year's campaign on the sidelines due to injuries and reportedly failed a medical ahead of a transfer to Bundesliga side Stuttgart.
But 25-year-old Ba returned to form this term and managed six goals in 17 showings for Hoffenheim before demanding a Premier League move in January and refusing to take part in his club's training camp.
Stoke City were apparently close to signing the player but it was reported he had failed a medical before Avram Grant's West Ham swooped for the African forward.