Crystal Palace produced a spirited display to earn a point from a lively encounter at the Liberty Stadium.
Swansea dominated the early exchanges and went ahead when Wilfried Bony shot on the turn into the bottom corner for his sixth goal in the last seven games.
But Jonjo Shelvey felled Marouane Chamakh and Mile Jedinak converted from the spot to equalise for Palace.
There were fewer chances after the break, Gylfi Sigurdsson twice firing off target from the edge of the area.
After the euphoria of last week’s impressive victory against Liverpool, it was another solid performance from Neil Warnock’s Palace, who might have been swept aside within the opening quarter.
Swansea began in irresistible fashion, Jefferson Montero and Wayne Routledge causing havoc on the flanks and Sigurdsson linking skilfully with Bony through the middle.
Bony, who had already twice gone close after flowing team moves, collected Sigurdsson’s disguised pass just inside the area and fired in acrobatically from close to the turf.
Ironically, Palace improved after striker Dwight Gayle went off injured, as his replacement James McArthur brought much needed extra presence to the midfield.
The visitors had been reduced to the occasional foray from the pacy Yannick Bolasie but it was one of those bursts that led to a brace of corners, the second of which resulted in the penalty.
Shelvey was adjudged to have backed into Chamakh and Jedinak hit the spot kick down the middle to send Lukasz Fabianski the wrong way.
The equaliser revitalised Palace and they might have taken the lead when Ashley Williams missed his kick to allow Chamakh a clear sight of goal eight yards out, but Fabianski was alert to rush out and smother the shot.
Swansea fans were convinced Chamakh, who had been booked for a scything challenge on the touchline, should have been dismissed for a handball on the edge of the box.
And Shelvey should have atoned for his earlier misdemeanour shortly before the break, firing wide when unmarked in space eight yards out.
After the break Swansea’s creative players were unable to exert as much influence on proceedings as Palace’s well-marshalled defence ensured further progress, the Eagles climbing to 14th in a congested mid-table.