Such has been the strife Sir Alex Ferguson has been forced to endure this season, the Ecuador wide man has alternated between his usual right wing role and that of full-back.
It is a responsibility Valencia has accepted without complaint.
However, his performance in Saturday's Premier League triumph over Bolton emphasised why Valencia is not the only one who is glad more accustomed options to fill the right-back role are at hand.
"It is really pleasing thinking that we are getting everyone back to full fitness," he told MUTV. "It is nice to be back in my favoured position, that I have always played in throughout my career.
"At full-back, going forward is not a problem. Defending is slightly more difficult.
"There is more pressure because you are playing closer to your own goal. You have to be really focused and concentrated to make sure you don't commit an error that can lead to a goal.
"It is the same for any defender so I have to work hard to stay really sharp because that is area of the field where you get punished."
There could be a further spin-off if speculation that Dimitar Berbatov is weighing up a return to Germany proves to be correct.
After a run of six goals in three games, Berbatov's anonymous display in the defeat at Newcastle a fortnight ago led to him being left out of United's squad for the FA Cup win over Manchester City.
Although the 30-year-old was on the bench this weekend, Javier Hernandez was called upon to replace injured goalscorer Danny Welbeck, leaving last season's Golden Boot winner once again kicking his heels.
Even with Michael Owen sidelined, Berbatov's chances appear to be limited and Ferguson's recent assertion that United would take up a one-way option on his contract may not mean much if any transfer fee could be invested elsewhere.
Certainly a player who polarises opinion amongst the United support could not be classed as giving value for money at present, despite his recent hot streak, if Ferguson continues to overlook him, as he has done for virtually 12 months now.
Intrigue also surrounds 18-year-old Ravel Morrison, who has denied the claim Ferguson made on Friday about him rejecting a contract offer.
"I have never 1s (once) turned down a contract off Manchester United," said Morrison on Twitter, fuelling yet more debate about a troubled, but highly-talented teenager, who is still to make a Premier League appearance for United.
Less controversial is Ferguson's assertion that Mame Biram Diouf may leave on loan this month, whilst it remains a mystery to the United boss why no one has enquired about the services of former Poland keeper Tomasz Kuszczak, who is now totally out of the first team picture.
For all the talk of comings and goings, Paul Scholes' arrival thus far is Ferguson's most significant piece of business during the transfer window.
Plenty have claimed it is a regressive step by the Red Devils.
However, the dressing room seems sincere in its belief Scholes' return is a force for good as United face up to Sunday's trip to Arsenal.
"We still have some longer absences like Darren Fletcher and Tom Cleverley so it has given us a bit of respite to have Paul Scholes back," said Valencia.
"It is all right talking about three teams but you can't take out Arsenal and Chelsea, so that is why we have to put our foot to the floor and push as hard as we can."
