Manchester City have a weapon that is due to explode at Wembley against Chelsea in todays FA Cup finalErling Haaland has been a goal-scoring machine ever since he signed for Manchester City from Borussia Dortmund in the summer of 2022. In 196 appearances in all competitions for City, Haaland has scored 161 goals. That is a phenomenonal record and it illustrates how elite a goalscorer that Haaland is. However, strangely, Haaland hasnt scored in the nine cup finals he has played for Manchester City, nor has he scored in the eight matches he has played at Wembley. At some point, that record will change. Todays FA Cup final against Chelsea is the ideal stage for Haaland to break his Wembley and cup final duck for Manchester City. In fact, it does feel like Haaland is ready to explode into life on the big stage after having a much-needed rest this week.Erling Haaland has carrieda heavy workload for Manchester City this season.Erling Haaland was rested as Manchester City beat Crystal Palace 3-0 at the Etihad Stadium on Wednesday night. That rested came at the right time for Manchester Citys top-scorer. Haaland has carried a heavy workload throughout this season for both club and country. Pep Guardiola pointed this out when he spoke to media yesterday. Speaking on the toll that Englands demanding football calendar takes on Haaland and his teammates, Guardiola said: Its the end of the season; the fatigue is always there. Mentally, physically. Erling has played a lot of minutes. And you have three days [game] and now three days [game] and after winning or losing the main target after the game is guys take a shower quick, come back to Manchester and go to sleep because on Monday you have to fly to Bournemouth.That is the calendar. Imagine. Imagine. Its hypothetical but tomorrow if we win the game, we can not even celebrate it.Manchester Citys top-scorer should enter todays match ready to go and he could be his teams match-winner.Across this season Erling Haaland has played 3964 minutes in 50 games for Manchester City in all competitions. Haaland has scored 37 goals and laid off 8 assists in those matches. Haaland has gotten through a mountain of work for his team, which speaks volumes about his fitness and recovery. Rest is rare for Haaland. However, he got that against Crystal Palace, and that could set him up to break his Wembley and cup final duck against Chelsea at Wembley in todays FA Cup final.Erling Haaland should enter todays match feeling refreshed. He has a week off from playing, with the hope being that if he starts todays FA Cup final, as expected, he will be raring to go. Chelseas defence isnt their strong point, and if City can create chances today, Haaland could prosper in a big way, which could help fire Manchester City to victory in todays FA Cup final.Erling Haaland has had a rest at exactly the right time ahead of the FA Cup final. Haaland could be primed to break his Wembley drought and fire Manchester City to FA Cup success over Chelsea today. It does feel like days like today are made for Haaland, and hopefully, he can have a major impact in a cup final for Pep Guardiolas side.