The Chelsea coach, Maurizio Sarri, fought against the fever and was content with just the result and got the qualification for the Europa League qualifying rounds after a disappointing performance in the 1-0 victory at BATE Borisov.
Chelsea's fourth win in as many Group L games – three now 1-0 – was played in the icy and memorable fog only for France's first Blues goal, Olivier Giroud, from May's victory over Liverpool, 794 minutes sterile strip.
"The best situation tonight is the result, we did not play very well," said Sarri.
"It was not very easy to make a good game here, there were all the conditions to play very badly, for the cold, for the opponents, for the field, for everything. I think we could have done better.
"I did not like the first semester, we only moved the ball horizontally and slowly, it was very difficult to be dangerous.
"Better in the first 20, 25 minutes in the second half, then we managed not so well in the last 1
For Sarri, it was a busy day.
He added: "Today I was in trouble too, I had a fever and it was a very hard day for me, I do not know if I'm getting better or if it's just the temperature."
The BATE, comfortably beaten last month in London, hit three times the wood, including the period of interruption, and the Eden Hazard services were needed longer than expected in Belarus.
As the game came into play at 51 & rdquo; Hazard was fouled and sent the resulting punishment that hovered from the game over the far post.
At that point Hazard should have left and Sarri was wildly gesticulating in his technical area, apparently towards the Belgian.
. Giroud struck a few moments later, heading to Emerson Palmieri's cross on the near post.
Giroud told BT Sport: "It's true, I was hoping to score early because I came back late from the World Cup and I was missing a bit of luck.You always have to work hard and keep your faith".
Sarri added: "I'm happy for him, he's a very important player for us because he's a very, very useful player for the team.
"But I know very well that the attackers want to score, so I think it's very important for his confidence, but I do not want him to be worried about scoring because it's very important to us, very useful."
Chelsea wanted to score another one, but instead it was BATE who was late.
"They played very well", added Sarri. "They were unlucky, I think they could draw the game."
Chelsea qualified with two games to play, the home match on 29 November with the PAOK of Greece and the December 13th voyage to Vidi in Hungary.
Sarri is now hungry for the additional point needed to secure the first place in the group, to postpone thoughts on Europe to the last stage 32.
He added: "The first goal in this competition was to qualify, now we want the second goal, to win our group.
"It's very important because then we can talk again about this competition in February, and in February we will definitely have another goal, but the first one is very important."