Keita missed Liverpool’s past four games with a hamstring issue but returned to full training on Sunday and then travelled with the 21-man squad named by the Reds for the trip to Serbia.
“It was a very good start. He did a proper pre-season from the first day, played fantastic games and made a good start in the league,” Klopp told Liverpoolfc.com of the No.8.
“Then he had two [injury] things – in Naples and then with the national team. It was not that long, it only feels it. It was four games.
“[Sunday] was the first time in 100 per cent training so we will now have to see what we do with him for [Tuesday].