Manchester United fans have not forgotten the Sunderland boss' early transfer failure at the club amid Thiago Alcantara putting Arsenal to the sword.
Bayern Munich's Thiago Alcantara scores their fourth goal
Arsenal were ruthlessly picked apart in last night's Champions League last 16 round tie by Bayern Munich at the Allianz Arena.
The star of the show was central midfielder Thiago Alcantara, who netted two second half goals to surely put the tie beyond doubt already.
Thiago is a name Manchester United fans recall well, for he was widely touted as the club's first major signing of the post-Sir Alex Ferguson era.
Free to leave Barcelona, he seemed Old Trafford bound before ex-boss Pep Guardiola stepped in to lure him to Bayern late in the day, but was there more than caught the eye?
Spanish football pundit Guillem Balague said at the time that Moyes was never convinced about Thiago, and hesitated over a move.
United were willing to pay clause 4 Thiago. But Pep believed in Thiago. Moyes not so much (will his football work in PL? Moyes wasnt sure)— Guillem Balague (@GuillemBalague) July 14, 2013
This might not have been so bad had United made other impressive moves, but their sole summer signing under Moyes was a late, desperate deal for Marouane Fellaini - and the manager was sacked before the season was out.
Four years on and United fans have not forgotten Moyes' big mistake - and how can they when Thiago is currently ripping apart their Premier League competitors on Europe's big stage.
Here is a look at how supporters reacted on Twitter last night...
THIAGO ALCANTARA!!!! David Moyes I will never forgive you!!!!!!!!!!— TUNDAY (@TundayB) February 15, 2017
Moyes was unsure about Thiago you know pic.twitter.com/cAymuPJvZP— Ben (@FocusBxn) February 15, 2017
Never forget Moyes not signing Thiago for £18 million but then going for Fellaini for £27 million. I hope he gets relegated— Chris07. (@c2thajay) February 15, 2017
Still annoyed at Moyes for screwing up the Thiago deal.— Brent Maximin (@brentmaximin) February 15, 2017
Former Manchester United Manager David Moyes