Manchester United is the only English club to have won the coveted trifecta of the Champions League, Premier League, and FA Cup. Still, Manchester City is on the verge of doing so.
On Wednesday, City advanced to the Champions League semi-finals for the third straight season, defeating Bayern Munich 4-1 on aggregate.
Pep Guardiola's men will face Real Madrid in the semi-finals, who eliminated them in the last four last season.
If City defeats the defending champions, they will be heavy favourites to finally complete their European quest, with AC Milan or Inter Milan waiting in the final in Istanbul on June 10.
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Domestically, City is already the dominant power as they seek their fifth Premier League title in six seasons.
Long-standing pacesetters Arsenal leads the table by four points but exhibits anxiety symptoms following expensive draws against Liverpool and West Ham.
City has a game in hand and home advantage when Arsenal visit the Etihad for a potential title decider next week.
Guardiola's men travel to Wembley on Saturday for what should be a simple trip to the FA Cup final.
Sheffield United are on the verge of regaining their Premier League status for next season. Still, it would be a great surprise if the Championship club ended City's 15-game unbeaten streak, which began in February.
Despite the signing of Erling Haaland, who garnered his 48th score of the season in a 1-1 stalemate in Munich on Wednesday, there were many concerns about City just a few months ago.