Sido Jombati says Cheltenham Town need five wins from their last nine matches to secure a third successive appearance in the League Two play-offs.
The Portuguese full-back has described their top-seven target as 'the impossible' after a difficult season for Mark Yates' team, but he is adamant that they can achieve it.
Tuesday's home draw with Wycombe left the Robins six points behind seventh-placed Plymouth ahead of tomorrow's trip to AFC Wimbledon.
"We need to do the impossible, but the impossible is possible and we are going to go for it," Jombati said. "There is still a chance because nine games is a lot and five wins is more than possible.
"We are going to have to go to harder places like Rochdale, where nobody will expect us to win, but I expect my team to win there.
"I know it's one of the toughest places to go this season and they are a very good team, but we need to get together and get a win if we are going to do it."
Jombati said that Cheltenham must go for all three points at Kingsmeadow, with draws no longer enough if he is to maintain his record of appearing in the play-offs during all three of his seasons at Whaddon Road.
"Let's go for a win at Wimbledon because there is no point drawing," he said. "That doesn't help us at the moment so we have to go for the win.
"We needed three points on Tuesday because we wanted to get as close as we could to the play-offs and it was a frustrating day. I see it as two points dropped, but I know we have the capabilities in this squad to win five of our last nine games."
Cheltenham have struggled for consistency all season, but they go into tomorrow's match unbeaten in five. One of their main problems has been stringing victories together. Only once have they won back-to-back games, against Fleetwood and Exeter either side of Christmas.
"If we can get two wins in a row now we know we are going to right back up there," Jombati said. "In previous seasons we have won consecutive games many times, but this time we have struggled.
"I had a feeling if we didn't go up it would be harder, which proved to be right, but can still do the impossible. This season has been much tougher, but it's been done before by other teams, so there is no reason why we can't do it."