Sam Lee of Goal reported manager Pep Guardiola will make a concerted effort to bring Mbappe to the Premier League after believing Sanchez would arrive at the Etihad Stadium. The Chile international is reportedly considering an offer to move to the French capital and turn his back on a potential deal with City.
Guardiola requires a superstar signing ahead of the start of the campaign, and Mbappe has developed into one of the top young players in European football with Monaco. He fired them to the Ligue 1 title last season, forcing PSG to scour the market to reclaim the championship.
Goal (h/t Bleacher Report Football) confirmed Sanchez could soon leave for France:
The City boss has initiated a clear-out at the club, with a number of established players on the verge of leaving, per Lee. Guardiola needs to replace exiting individuals with world-class stock, and Mbappe fits the profile of the type of talent the Spanish coach loves.
Monaco recently released a statement saying they will report any team that illegally approaches the 18-year-old during the summer.
Per the club's official website, Monaco issued a firm defence of their stance:
"AS Monaco regretfully notice that important European football clubs made contacts with Kylian Mbappe (and his entourage) without its authorization.
"AS Monaco want to remind to these clubs that such actions are contrary to the article 211 of the Administrative regulation of the French Football League (Ligue de Football Professionnel) and to the article 18.3 of the Regulation of the Status and the Transfer of the Players of FIFA.
"To put an end to this unacceptable situation, AS Monaco consider asking the French Football League (Ligue de Football Professionnel) and the FIFA to commit disciplinary procedures against clubs offenders."
Sky Sports News' Bryan Swanson explained Monaco's statement was aimed at City and PSG, as they attempt to hold on to their jewel in the crown.
Here is Mbappe in action:
Guardiola's first season in charge was short of being considered a success, and it is imperative he gets it right in the forthcoming campaign.
Sanchez would have given the City boss guaranteed goals in the Premier League and Europe, and Mbappe is not a direct replacement for the Chilean's attacking style.
However, the French youngster is on the cusp of becoming one of the best players in the world, and there will be a huge demand for his signature if he comes on to the market.
Mbappe scored 21 goals in Ligue 1 and the UEFA Champions League last season, per WhoScored.com.
City need to win trophies in the next 12 months or Guardiola's tenure will be under question.