There was a time when to suggest David de Gea should be dropped would be considered sacrilege by Manchester United fans.
Not long ago the Spaniard could lay claim to being among world's best goalkeepers and was voted the club's player of the year in four out of the last six seasons.
But his rate of decline over the last season or so has been alarming. On Tuesday night in the EFL Cup semi-final against Manchester City, Sergio Romero may be given the chance to crank up the pressure on United's No 1.
David de Gea made an awful mistake for Ismaila Sarr's goal in Watford's 2-0 victory
Sergio Romero has been playing well and is putting pressure on the Manchester United No 1
Since the start of last season, De Gea has made six mistakes directly leading to opposition goals.
The howlers keep on coming, most recently against Watford when he allowed a tame effort from Ismaila Sarr to inexplicably slip through his fingers.
In the previous Premier League game, against Everton, he flapped at a cross, missing the ball which ricocheted in for an own goal. These two high-profile errors were more than an unfortunate coincidence. They continue a pattern of costly mistakes over two seasons.
Ole Gunnar Solskjaer has never hinted at dropping the 29-year-old but if the slump continues, may be forced into making one of the biggest calls of his managerial career.
The pressure ratchets up further when considering Romero's claim to the position. Whenever the No 2 has come into the side, he's acquitted himself superbly.
De Gea flapped at a cross under pressure which led to an own goal against Everton
The Argentina international has kept 33 clean sheets in 52 games for United during his time at the club, an undeniably impressive record.
Granted, a number of those outings have come against inferior opposition in cup competitions - he is the unofficial No 1 goalkeeper in domestic knockout games - but the 32-year-old cannot do much more to further his case.
Since August 2017, a solid sample size over two-and-a-half seasons, his statistics eclipse De Gea's in a number of important areas.