Christian Pulisic, Tammy Abraham, Mason Mount, Fikayo Tomori, and Emerson Palmieri were required to self-isolate amid the COVID-19 pandemic during the pre-season, Goal.com reported.
PSG sporting director Leonardo suggested referee Jerome Brisard lacked the experience to officiate such a highly-charged fixture.
Calvert-Lewin rose above defenders Eric Dier and Toby Alderweireld to meet Lucas Digne's free kick and power a header past goalkeeper Hugo Lloris 10 minutes into the second half.
Castagne, a defensive signing from Atalanta, made an impact at the other end by heading in a cross from fellow Belgian Dennis Praet in the 56th minute.
The 31-year old Fanai, who hails from Mizoram, and the 29-year old Reagan from Manipur have joined Chennaiyin on free transfers, a press release from the club said.
William comes with an impressive CV, having won the I-League in 2016-17 and a runner-up finish at the 2016 Federation Cup with Aizawl FC.
Simeone, 50, is isolated at home and has not presented symptoms.
Just when the visitors looked like claiming a point, new signing Rodrigo - on as a substitute - fouled Fabinho in the area and Salah sidefooted home the resulting spot-kick.
The Brazilian, along with the likes of Kylian Mbappe, Angel Di Maria and Leandro Paredes, were all quarantined, with Neymar making his return to training on Friday.
Palace fielded a heavily patched-up defense because of injuries to centre-backs James Tomkins, Gary Cahill and Mamadou Sakho and full-backs Patrick van Aanholt and Nathan Ferguson.
Eibar finished with 10 men after Pape Diop was sent off for a second booking with three minutes left.
And Willian's pass fed Pierre-Emerick Aubameyang, who faced little resistance as he cut in before curling into the top corner.
Arteta, whose side open their Premier League campaign at Fulham on Saturday, said he had no concerns about bringing in a player in his 30s.
Bayern head coach Hansi Flick admitted that the uncertainty makes planning "not quite so easy".
The Premier League announced last Thursday that they have terminated their cooperation with Chinese broadcaster PP Sports.