At the same time, United boss Jose Mourinho described Sanchez as "phenomenal", seemingly signaling Old Trafford interest in the contract rebel.
"In relation to Alexis Sanchez, I don't say a word".
"It's unethical to speak about other clubs' players and the manager has always said that".
"Is he (Sanchez) replaceable in the way that we find exactly the same player?"
Arsene Wenger yesterday denied that the Gunners had made a move for the Brazilian, but also didn't rule one out in the future.
When asked if Ozil could remain at Arsenal, Wenger said, "Yes".
But United has reportedly emerged as genuine rival to City, whose main attraction to Sanchez is understood to be the presence of Guardiola, the coach who signed him for Barcelona.
A host of top English clubs including league leaders Manchester City and their domestic rivals Manchester United have been linked with a move for the Chile global, though the Blues boss has now confirmed that the Londoners will not be part of this.
However, they fear they are being used by Sanchez's agent to elicit a higher bid from Manchester City and so have given the striker a deadline to make up his mind.
Playing with Raheem Sterling on the wings either side of Sergio Aguero and Gabriel Jesus, Sane has been in devastating form this season.
Ritchie said on MUTV: "A player of his stature and nature, you have got to be interested". If Pep wants him again now, I'm sure he's thinking: 'I'm going to go there second time round and do it properly this time'. I don't want to give you wrong information.
But Wenger played down talk of a move saying: "He is a good player but nothing is happening".
Yes Manchester City have been very much interested and are the front runners, but there still are many clubs that are lurking around to grab the Chilean.
If Sanchez ends up staying at Arsenal this month, which is very possible, City will fancy their chances of landing him on a free transfer at the end of the season.