"Thank you from the bottom of my heart to everyone for your prayers and your thoughts," Ospina wrote on Twitter.
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David Ospina suffered an injury on five minutes after clashing with Udinese winger Ignacio Pussetto but played on until he collapses on 42 minutes.
Arsenal have been handed a difficult draw against Serie A side Napoli in the quarterfinals of the Europa League.
Sarri had previously suggested his emotional connection to his former club would make him wary of facing them.
A late Lorenzo Insigne goal rescued a 1-1 draw for second-placed Napoli at Sassuolo but it was not enough to stop them losing ground on Juventus.
Ten-man Juventus held on to beat 10-man Napoli 2-1 in Serie A on Sunday despite an unrelenting comeback attempt from the hosts at the San Paolo.
Arkadiusz Milik scored twice as Napoli rediscovered their scoring touch with an emphatic 4-0 win at Parma.
Chinese Super League side Dalian Yifang have completed the signing of Slovenia international midfielder Marek Hamsik from Napoli.
Napoli drew 0-0 with Torino on Sunday, their third goalless draw in four Serie A games.
Marek Hamsik has been at San Paolo since joining from Brescia in 2007 and went onto become the club's record goal scorer and appearance maker.
Second-placed Napoli wasted half a dozen clearcut chances as they were held 0-0 at Fiorentina in Serie A on Saturday.
Marek Hamsik's move from Napoli to a Chinese club has been put on hold after the Serie A club claimed irregularities in the transfer fee payment.
It has been claimed that Liverpool have made an offer of around €70m for Napoli's Lorenzo Insigne. Transfer Talk is LIVE with the latest.