“In a press conference you are always confronted with many speculations about transfers, for me they stay until the end of the season.
“Will they stay longer? That is impossible to answer today.”
Sanchez, 28, has been angling for a move away from Arsenal for the past year, frustrated at the club’s failure to challenge for major honours.
The Chilean saw a deadline day move to Manchester City to collapse in August, and was hopeful a deal could be resurrected in January.
Now he will be asked to stay in North London until next summer, when the signs are he will quit the Gunners on a free transfer.
Germany World Cup winner Ozil is another who has failed to agree terms over a new contract with Arsenal.
Wenger claimed last month he may opt to cash in on the midfielder when the transfer window opens to avoid losing him for nothing.
Barcelona and Manchester United have both been linked with moves for the former Real Madrid star with reports in Spain last week claiming a mid-season move to the Nou Camp was possible.
And former Arsenal striker Ian Wright believes Ozil will snub the offer of staying at the Emirates and make a free transfer switch to Old Trafford.