Celtic goalkeeper Craig Gordon says the Scottish champions had to battle to get their 2-2 draw at Salzburg.
Benaglio has wandered off for some treatment.
Baines and Naismith combine to give Everton the lead (with some help from a defender bundling it in)
Tottenham held firm in intimidating conditions to kick off the Europa League group stage with a hard-fought, goalless draw at Partizan Belgrade.
Celtic twice surrendered the lead to draw 2-2 with Salzburg in their thrilling Europa League Group D opener in Austria.
Mubarak Wakaso scored 14 minutes into his Hoops debut but Brazilian striker Alan levelled 10 minutes from the break with a shot from the edge of the box which took a marked deflection off Efe Ambrose before looping over Craig Gordon.