Leyton Orient boss Russell Slade insists his side are the outsiders for the play-offs despite finishing third in League 1.

The O's will face Peterborough United in the semi-finals after ending their league campaign with an impressive 3-1 win at MK Dons. 

Slade said: "That's the sort of standard we set ourselves because we're underdogs going into the play-offs. There is no doubt about that because you've only got to look at the bookies and we're not given a chance."

Orient will face sixth-placed Peterborough with the first leg away on Saturday at 12.15pm. Slade's side will host Posh in the return leg on Tuesday, May 13 with a 7.45pm kick-off.

Slade said: "They have an excellent play-off record and are an excellent side. Darren Ferguson's done a great job and they've already won one competition [Johnstone's Paint Trophy] this season and played at Wembley so they'll be looking to get there again. We know it's going to be very, very tough."

A brace from Kevin Lisbie and David Mooney's 19th league goal of the season helped Orient finish on a record total of 86 points. 

Slade said: "I thought there was some really good football. MK Dons are a good side and they were hoping to finish in the top ten which they did. But concentrating on our performance I thought the goals we scored were exquisite. I thought they were very, very well taken."

Tickets for both legs will go on sale on Monday at 10am. Priority for the away leg will go to season ticket holders with a stub from the MK Dons game. 

Season ticket holders will have Monday and Tuesday to purchase their own home seat. Remaining tickets for the second leg will go on general sale on Wednesday with a maximum of four per person.