Southampton defender Taylor Harwood-Bellis said that his side back themselves to "beat anyone" in their remaining matches this season.
Saints will play at least two more games, with a play-off semi-final against Middlesbrough to come before a Wembley final should they get past Boro over two legs.
Victory against Preston North End on the final day of the regular season saw Tonda Eckert’s side seal a fourth-placed finish, four points off the automatic promotion spots, and still in with a chance of reaching the Premier League.
Harwood-Bellis admitted that their recent run of form – which includes a 19 league game unbeaten run – is down to the efforts of the entire football club and staff.
"We back ourselves to beat anyone, home or away," he told BBC Radio Solent.
"There's a relentlessness in the team, the manager and the staff at the moment, it's where we're living, right at the top, every single day in what we do.
"No one's taken days off, we've just been at it and it shows – even the loss at Wembley which was a sucker-punch but we've come out with so many positives that we can handle ourselves. We're fit, we're strong, we're just a different level at the minute."
The win for Saints at the weekend came after a winless run of three games which included two league draws and defeat to Manchester City in the FA Cup semi-final.
The Saints centre-back scored with a header at Deepdale, his seventh goal of the season in 41 league appearances, and said Eckert had been keen to stress to the group the importance of taking momentum into the play-offs.
"We made a massive deal about getting back to winning ways before the game," he added.
"In the hotel and a few days leading up, he (Eckert) said not to underestimate how important that Preston game was.
"It was so important to just get back to that momentum and getting that winning feeling back."
Saints travel away to the Riverside on Saturday for the first leg of their play-off match before hosting Boro at St Mary's the following Tuesday.
