Kai Havertz said he expects "a big turnaround" in his fortunes at Chelsea now he is free of injury and illness, and that there can be no excuses if he fails to deliver at Stamford Bridge.
The German midfielder has scored just once in 21 Premier League appearances since arriving from Bayer Leverkusen for $98.20 million at the start of the season.
However, a combination of Covid-19 and an apparent lack of trust by former manager Frank Lampard saw Havertz, 21, used mostly as a substitute before picking up an injury last month.
"The coronavirus is now over [for me] and I feel good," Havertz told Chelsea's website. "I had a little injury in the past few weeks but it's now time to play good.
"It has not been easy for me but there are no excuses.
"I just have to keep on working and hopefully there will be a big turnaround soon."
Chelsea host Atletico Madrid in the second leg of their Champions League last-16 tie on Wednesday. They won the first leg against La Liga side 1-0 in Bucharest.
The Blues are unbeaten under Thomas Tuchel since the German replaced Lampard in January.
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Leeds v Chelsea player ratings
Muslim Council of Elders condemns terrorism on religious sites
The Muslim Council of Elders has strongly condemned the criminal attacks on religious sites in Britain.
It firmly rejected “acts of terrorism, which constitute a flagrant violation of the sanctity of houses of worship”.
“Attacking places of worship is a form of terrorism and extremism that threatens peace and stability within societies,” it said.
The council also warned against the rise of hate speech, racism, extremism and Islamophobia. It urged the international community to join efforts to promote tolerance and peaceful coexistence.
If you go
The flights
Emirates and Etihad fly direct to Nairobi, with fares starting from Dh1,695. The resort can be reached from Nairobi via a 35-minute flight from Wilson Airport or Jomo Kenyatta International Airport, or by road, which takes at least three hours.
The rooms
Rooms at Fairmont Mount Kenya range from Dh1,870 per night for a deluxe room to Dh11,000 per night for the William Holden Cottage.
The specs: 2019 BMW X4
Price, base / as tested: Dh276,675 / Dh346,800
Engine: 3.0-litre turbocharged in-line six-cylinder
Transmission: Eight-speed automatic
Power: 354hp @ 5,500rpm
Torque: 500Nm @ 1,550rpm
Fuel economy, combined: 9.0L / 100km