The Senegal forward helped the Reds lift their sixth European Cup as they beat Tottenham in the Champions League final on June 1 in Madrid.
He appeared in the 3-1 friendly victory over Lyon in Geneva, and the Community Shield final against Manchester City, before being named as an unused sub during the opening day win against Norwich City.
Asked if Lonergan will be on the bench on Wednesday, he replied: "I think so".
Liverpool's front-three have become unplayable at times under Klopp, but there is always the risk of overplaying them. I don't think I've had a holiday of more than 20 days in seven years.
Klopp admitted after the match that Alisson's injury "doesn't look too good" and have moved to sign another free agent in Lonergan, the 35-year-old signing a one-year deal with the Anfield side.
Adrian has been in now for his second week.
However, due to this suspected injury, Liverpool fans will be on hold to watch him play for the current European champions.
"We can not now do the hardest training with him every day and stuff like this, we have to make him match fit every day, that's how it is". It's not the situation you hope to be in, that Alisson is injured and you have to come in.
Whether or not Chelsea mix it up remains to be seen but regardless of what approach Lampard takes the Blues will do well to avoid a repeat of Sundays beating when they come up against a superior Liverpool side.
"He looked very good and very sharp from the first session he had with us but of course now we need to be careful [and] pack him in cotton wool pretty much", said Jürgen Klopp of the No.13.