The Belgian was not part of the United team that won 2-1 at Bournemouth on Saturday after picking up an muscle injury in training on Friday.
Ronaldo will take on former club Manchester United in the Champions League on Wednesday.
Although numerous Red Devils should be praised for showing passion and determination in their desire to turn the game around, not everybody was willing to go the extra mile to ensure that we left the Vitality with all three points on Saturday.
"It was a first half that could, should be game over, 5-2, 6-2 easily, and in the second half until we scored I had the feeling we were a very unlucky team because we should score three, four, five goals".
United have kept just one clean sheet in the Premier League this season and their leaky defence was regularly exposed by Bournemouth.
Smalling admits it's something the side need to work on if they are to be successful this season.
"Juve have shown they don't concede many goals and hopefully we can get on the front foot". How we played in the second half was fantastic, but we want to be a "whole game" team.
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They also rejected the charges that their father was a supporter of the Muslim Brotherhood organization. The kingdom's public prosecutor Saud al-Mojeb later said he was killed in a premeditated attack.
The Portuguese tactician has been under intense criticism since the start of the ongoing campaign, not just due to his team's poor results, but also due to the boring and inconsistent manner in which his players have functioned on the pitch.
'We are showing that attitude of never giving in and you can see that coming out.
"All credit to them for sticking in the game during that first period because it couldn't have been easy with the way we played and how hard it was to defend our attacking players".
"He's gone from being that player who's been brought into the squad, who's happy to come off the bench and make that impact".
A 92nd minute victor from Marcus Rashford gave United a deserved away win.
"I am trying to find a balance where we develop the team and the talented players we have in the second and third phase of attack without losing the balance".
"We were really poor, defensively terrible". Mourinho's side are now seventh in the table, four points behind fourth-placed Tottenham and nine points behind leaders Manchester City.