Spartak Moscow are at the centre of a racism storm after captioning a video of three black players training with the words "see how the chocolates melt in the sun".
Spartak later posted a video in which Fernando says: "At Spartak there is no racism".
The tweet was published around 0900 GMT and retweeted over 1,400 times, triggering a wave of criticism before it was deleted nearly five hours later. "We are a friendly family".
"Spartak apologises for this unfortunate phrase", a spokesman for the club told news agency TASS.
United Kingdom anti-discriminatory body Kick It Out slammed the Russian club's conduct while voicing their concerns with the start of the World Cup just five months away.
Spartak Moscow have become embroiled in a fresh racism row after posting a tweet about three black players.
"It is a reminder, that along with the whole of football, there is significant work to do to eradicate racism of all forms from the sport".
Liverpool striker Bobby Adekanye was subjected to racist chants and gestures from Spartak supporters in Moscow during a Uefa Youth League game in September, while last month Spartak defender Leonid Mironov was charged with racially abusing Liverpool striker Rhian Brewster.
Spartak were found guilty in that instance and were made to partially close their academy ground for one match.
Former Zenit St Petersburg striker Hulk suggested racist incidents could mar the tournament while Manchester City's Yaya Toure warned Russian Federation back in 2013 that black players could even boycott the finals.
Spartak Moscow have already been in trouble with UEFA this year for racist behviour.
The tweet has been greeted with outrage online, as the country prepares to host the World Cup later this summer.