Arsenal star Alexis Sanchez has scored 14 goals in 24 games for the Gunners since completing a £35 million summer switch to the Emirates, but Queens Park Rangers midfielder Joey Barton still doesn't feel he's delivered the goods when it matters most.
Barton has blasted Sanchez for not standing up to be counted in big games for either Arsenal or Barcelona, in particular sharing his disappointing at an anonymous display from the Chilean maestro against Manchester United last month.
Sanchez was part of the Arsenal attack that simply failed to take their chances against the Red Devils, with Arsene Wenger's side ultimately paying a heavy price in a 2-1 home defeat that went completely against the run of play.
Barton sounds off
In an interview with Forever Sports magazine Barton insisted that Sanchez still has some way to go before being considered a true superstar on the world stage, claiming: “I said he was inconsistent, from what I saw for Udinese and Barcelona.
"You see him now, great at home against a smaller side but disappears against Manchester United."
Liverpool showdown looming large
The 26-year-old will get the perfect chance to ram Barton's words back down his throat when Arsenal face QPR on boxing day, but first comes the opportunity to deliver in a massive match against Liverpool this weekend.
Arsenal will hope to take advantage of Liverpool's shocking form of late when they visit Anfield on Sunday afternoon, but will need their big summer signing on top form to have any chance of doing so.
Three points for Arsene Wenger's men would be a huge shot in arm ahead of a busy run of festive fixtures, while also exorcising the demons of last season's thrashing on Merseyside at the hands of Liverpool.
Wenger will expect Sanchez to prove he's a match winner against a direct rival for Champions League qualification, but it remains to been if Barton's opinion will still hold weight once the 90 minutes are up at Anfield.