The French international's future since then has been a continuous source of speculation in recent months, with the highly-rated attacker has been listed alongside Arsenal, Real Madrid, Paris Saint-Germain and many others as the most prominent suitors.
And it has been claimed that the Gunners are themselves losing confidence that they will be able to snare the 21-year-old winger away from the Stade Louis II this summer.
"Yes, 100 per cent I expect him to stay", said Wenger.
An official announcement is expected when Arsenal return from their pre-season tour of Australia and China.
The France global is interesting both Tottenham Hotspur and Arsenal, French newspaper L'Equipe report - but Monaco are determined not to sell. You know people have big imaginations.
Chelsea have signed midfielder "Monaco" and the national team of France
I'm very impressed by the facilities. "As a 'keeper I would like to play a lot of games, to keep improving and helping Thibaut and improving with him".
If Arsenal make a third offer that is considerably improved, then perhaps things could change, but the situation looks very bleak for the London club at the time of writing. "Maybe he has too many options right now but In the end, he probably might not even move".
Sanchez has made it clear that he is not satisfied with Arsenal's Premier League position of fifth and failure to qualify for the Champions League.
Alexandre Lacazzete moved from Lyon for a club world record fee whereas left-back Sead Kosalinac signed from Schalke on a free transfer.
It's all insane. Well (according to all recent rumours) Arsenal are pressing hard to make the Monaco winger Thomas Lemar our next signing, and there certainly seems to be a concensus that he is now our main target.