Villa have not won any of their last 12 Premier League matches, and they lost 4-0 to Everton in their latest outing.
While many teams would have had their confidence knocked by their poor run of form, Sanchez claims that Villa’s morale remains high.
"The morale has always been good in the team,” he said. “We feel there is a confidence and we are all working towards the same goal here.
"This team are all together. That's very important.
"We have to stay positive and keep working.
"There's a pressure obviously and we are all aware of that. We also know what we need to do to resolve the situation. We are determined to sort it out and stay up.
"We have to be 100 per cent in training and 100 per cent in the games to change the situation."
Villa are under pressure to improve their performances, as they are starting to get cut adrift at the bottom of the table.
Following Sunderland’s win, Villa are now four points behind any other side in England’s top flight, and they are some way off safety.
It leaves them needing to pick up victories quickly, with their next match coming against Watford on Saturday.
The Hornets have been in good form this season, but Villa will realise the importance of picking up some points, as they look to increase their supporters’ optimism levels ahead of a busy Christmas schedule.