Everton, who won thanks to goals from Gylfi Sigurdsson, Oumar Niasse and Tom Davies, had to withdraw Seamus Coleman at half-time in what was just his second start since returning from a broken leg.
"Séamus Coleman has a muscle injury and will have a scan tomorrow".
"Surprised, very surprised. I've not heard it before", Allardyce said.
Palace remain in danger after their loss at Goodison Park.
"There wasn't anything wrong with his performance in the second half".
That Palace player was Belgium global forward Christian Benteke, who once again failed to find the back of the net in the defeat on Merseyside. Palace are 14th with 27 points.
Pistons trade Willie Reed to Chicago for point guard Jameer Nelson
That much was clear the moment they traded for Blake Griffin on January 29 and embarked on their current five-game win streak. The Pistons have been short at guard since Reggie Jackson was sidelined with an ankle injury on December 26th.
The defeat means Palace are now winless in their last four league games (two defeats, two draws).Iceland star Gylfi Sigurdsson, who will face the Super Eagles at the Russian Federation 2018 World Cup, had an impressive performance for Everton as he scored his side's first goal and provided the assist for the third goal.
The win leaves the two sides level on 30 points apiece in the middle of the table, though still just six points above the relegation zone.
"We struggled to cope in the first 35 minutes".
The Swans, who are now five league games unbeaten under Portuguese coach Carvalhal, looked like they would have to settle for a point until South Korea midfielder Ki drove home his first goal since May 2016 from the edge of the box with nine minutes to go to boost their survival hopes.
However, losing them for long could derail a campaign that is starting to get back on track again after a 2nd victory in 10 games was secured.
West Ham United beat Watford 2-0 and Stoke City came from behind to draw 1-1 against Brighton and Hove Albion.
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