Liverpool manager Jurgen Klopp returned to work on Thursday after a health scare.
The German was discharged from hospital on Wednesday evening having been admitted for tests earlier in the day after feeling unwell, forcing him to miss the first team's training session.
However, after a night at home the 50-year-old was back at Melwood on Thursday.
In February 2016 Klopp, who last week made a trip to South Africa for a charity event, missed the 2-2 draw at home to Sunderland after being hospitalised after suffering appendicitis.
On that occasion assistants Peter Krawietz and Zelko Buvac oversaw the team's 2-2 draw and they, plus coach Pepijn Lijnders, took Wednesday's training in the manager's absence.
All players have now returned from international duty - Spaniard Alberto Moreno, Germany's Emre Can, Dutchman Georginio Wijnaldum and Serbia's Marko Grujic - with the full squad scheduled to have their first training session together on Thursday afternoon.
With the only real doubt over Sadio Mane's hamstring problem, although the Senegal international has yet to be ruled out of Saturday's clash with Southampton, Klopp looks like being able to work with his strongest squad of the season so far.
Midfielder Adam Lallana is back with the group having not played a competitive game this campaign because of a thigh injury while captain Jordan Henderson has declared himself fit after a similar problem caused him to miss the Premier League win over West Ham before the international break and England's two friendlies against Germany and Brazil.
"I feel good. I completed my first session (on Wednesday), so hopefully I can play a part at the weekend," Henderson told liverpoolfc.com.