But the mishap duo came in for much criticism as the defending champions suffered a surprise 3-2 defeat, their first league loss for NINE MONTHS.
Dynamo Zagreb and Atalanta will play another game in the League's Group C tonight.
"I've been training in this position since the start of the season", said Fernandinho, who made two interceptions and had a passing accuracy of 90% against Shakhtar.
Worryingly for Guardiola's hopes of lifting the famous "cup with the big ears" in Istanbul later this season, City have endured a rocky start to the new Premier League season.
But he has failed to reach the semi-finals in any of his three seasons as City boss, extending his long wait to win the tournament for the third time -- his second triumph coming with Barca in 2011.
Shakhtar are a familiar foe, with the sides have been drawn in the same group in the last two seasons.
"He (Stones) is out four, 5 or six weeks".
Guardiola and Arteta will have dissected the surprise defeat to Norwich City together Credit REX
John Stones' injury in training means that City's only fit, first-team centre-back is the divisive Nicolas Otamendi.
Zinchenko will continue at left-back in the Manchester City lineup. This might have given Luis Castro something to think about his team's setup when they face the formidable Manchester City.
Following long spells of possession, the Citizens eventually broke the deadlock at the midway point of the half, with Algeria worldwide Riyad Mahrez finding the back of the net after 25 minutes.
The 25-year-old is now out of action for a few weeks after sustaining an injury in training earlier during the week, and his absence has dealt a huge blow on manager Pep Guardiola's plans.
And Guardiola is excited for the France international's comeback, convinced he will add another dimension to City's play. Fernandinho could drop into centre-back, something which Guardiola did with Javier Mascherano at Barcelona.
Gundogan skillfully played the ball into before slotting it past past Pyatov. Given that City have got a lot of games in quick succession, rotation will be the aim of the game despite Shakhtar providing a hard test on home turf.
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