Liverpool manager Jurgen Klopp returned to work today after his 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, Press Association Sport understands the 50-year-old was back at Melwood on Thursday.
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 this 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.