Hornets manager, Quique Sanchez Flores, meanwhile, was resolute when asked about the chances of Ighalo or strike partner, Troy Deeney, leaving Vicarage Road.
“It’s completely impossible,” Flores said.
“Our target as a team is very clear. The confidence of these players is amazing. They are completely confident in themselves.
“When we talk in the office with the sporting director and the owners we don’t talk about selling players.
“We talk about to continue growing with the same players, with the same group, try to add some for the future. The reality of the situation is we don’t want to lose anyone.”
Gunners boss, Arsene Wenger, has however instructed his scouts to find the London club a new striker – either this month or in the summer.
It is believed that Arsenal want players who will hit the ground running rather than those who will settle slowly at the Emirates Stadium.
Wenger’s men are top of the table, two points clear of nearest challengers, Leicester City, but are unlikely to take that for granted.
The Nigerian has scored 14 goals in his maiden Premier League campaign to fire the Hornets into the top half.