Swansea City boss Francesco Guidolin has not been given a date for when he will leave hospital, says the club.
He had been referred to a respiratory specialist in London.
“Francesco remains comfortable in hospital and is receiving excellent care and treatment,” read a Swansea statement.
“He is making good progress and is in good spirits following last night’s result at Arsenal.
“The club is in close contact with Francesco and his consultant and his progress is being reviewed on a regular basis.
“No release date from hospital has been confirmed at present.”
The Welsh club earlier said Guidolin was “comfortable” and his full recovery was expected within a few days, adding: “The specialist felt the best course of action was for Guidolin to remain in hospital for a few days to receive further treatment.
Swans coach Alan Curtis took charge of the side at the Emirates Stadium and said the win will have lifted Guidolin’s spirits.
Following the win over the Gunners, Swansea face three crucial matches in their battle against relegation from the Premier League.
They host Norwich City on Saturday before a trip to Bournemouth on 12 March and then bottom club Aston Villa visit the Liberty Stadium on 19 March.
Wednesday’s victory moved Swansea six points above the relegation zone in 16th place.