The Chelsea attacking midfielder, who scored the winning goal in last season’s Champions League final, has been suffering with a ‘mild flu-like infection’ and therefore missed Germany’s thumping 6-0 victory at home to Armenia in Group J.
Havertz’s illness will have been a concern for Thomas Tuchel, with Chelsea facing Aston Villa in just five days time, but the 22-year-old has made significant strides with his recovery and may feature in Reykjavik on Wednesday evening.
There is a chance newly-appointed Germany head coach Flick could have a fully fit squad to choose from for the clash, with Atalanta full-back Robin Gosens also making the trip to Iceland following a foot injury.
‘We will take everyone with us. Kai has trained on a bike, but not out on the pitch yet,’ he told reporters after Germany’s defeat of Armenia.
‘Things are already looking a lot better for Robin.’
Germany’s comprehensive win at Stuttgart’s Mercedes-Benz Arena – Flick’s first match on home soil – saw them go top of Group J, with a two-point gap between themselves and second-placed Armenia.
‘We wanted to achieve two things tonight: to go top of the group while playing exciting football which is fun to watch,’ Flick added.
‘Quite simply, we achieved both of those.
‘I said before the game that I remember Stuttgart having a great atmosphere and that was again the case today.
‘The team’s great performance and the great noise created by the fans went hand in hand.
‘It was enough to give you goosebumps and we’ve not had that for a long time now.’