Man United finished sixth in last season's Premier League table, meaning that they will compete in the Europa League next term, with Manchester City, Liverpool, Chelsea and Tottenham Hotspur claiming the top four spots.
According to AS, Ronaldo is becoming concerned that his side's rivals are pulling further clear ahead of the start of the 2022-23 campaign.
The report claims that the Portugal international is 'worried' that the 20-time English champions have not been able to boost their squad following a disappointing 2021-22 season.
Ronaldo's future at Old Trafford has recently been called into question, but the 37-year-old has allegedly made the decision to spend at least one more season with the Red Devils.
The Red Devils are also keen to sign a new centre-back this summer, while a new goalkeeper will arrive if Dean Henderson completes a move to Nottingham Forest.
Five new signings could reportedly arrive at Old Trafford before the end of the transfer window, with the club's budget believed to be in the region of £130m despite their failure to qualify for next season's Champions League.
Ten Hag is currently preparing for the start of pre-season training on Monday, although the players involved for their countries during the recent international break will not report for duty until next month.
Man United's pre-season tour of Thailand and Australia will see them take on Liverpool, Melbourne Victory, Crystal Palace and Aston Villa, before returning to Europe to face Atletico Madrid and Rayo Vallecano.
The 20-time English champions will then begin their 2022-23 Premier League campaign at home to Brighton & Hove Albion on August 7, while they will also face Brentford, Liverpool, Southampton and Leicester City before the end of next month. body check tags ::