Sanchez spent three-and-a-half seasons at the Emirates Stadium, where he racked up 80 goals and 46 assists in 166 appearances for the Gunners before he joined United in January.
Jones spoke to MUTV and was asked whether the prospect of facing Arsenal would have an impact on the Chile international (h/t Sky Sports):
"Not so much at home. I think, if it was away at the Emirates, it might be a bit different. Going back to a place where he's very fond of, knows the pitch well and the fans well. "So, at home, it's a little bit different, but he will still get that added incentive to try to put one over on them."
Sanchez has also been praised by United boss Jose Mourinho ahead of the match, per the Red Devils' official Twitter account:
The 29-year-old has taken time to settle at Old Trafford and has struggled to produce his best form. In 14 appearances for his new club, he has five assists and has scored three times.
His most recent goal in United's colours came in the FA Cup semi-final against Tottenham Hotspur. He produced a fine header to convert Paul Pogba's cross, as BT Sport Football highlighted:
Football writers Liam Canning and Jordan Clarke praised his efforts:
The Red Devils will be hoping to see much more of that next year, and privately, they may be pleased Sanchez will not be involved at the FIFA World Cup. Chile's failure to qualify will afford him his first summer of rest since 2013.
Since the 2014 World Cup—where La Roja got to the round of 16—Sanchez's national team has reached two Copa Americas and the FIFA Confederations Cup final.
For the remainder of this campaign, the forward can help his side finish on a high, as United will want to secure second place and win the FA Cup.
If he can put in a strong performance against Arsenal—who will have an eye on the second leg of their UEFA Europa League semi-final tie—on Sunday, it would go a long way toward helping United achieve their highest league finish since they won the title in 2012/13.