Port Vale remain in the League One relegation zone after surrendering a two-goal lead to lose 4-2 against in-form Exeter.

Goals from Ethan Chislett and Baylee Dipepa put the Valiants firmly in charge at half-time, but two goals for Millenic Alli and one each for Zak Jules and Luke Harris earned the visitors – now unbeaten in eight matches – victory and leaves their opponents three points from safety.

Vale came close to opening the scoring in the 13th minute when Ben Garrity was denied by Viljami Sinisalo from close range after bringing down Chislett’s measured pass over the top.

And the hosts went in front just after the half-hour mark as a cleared corner was volleyed home brilliantly by Chislett from outside the area.

Their advantage was doubled in the 40th minute, with 17-year-old Dipepa cutting in from the right and guiding a left-footed shot past Sinisalo.

Alli nearly pulled a goal back for Exeter within moments of the restart, but his attempt from Yanic Wildschut’s delivery was saved by Connor Ripley.

The striker did find the net, though, in the 57th minute, with his deflected effort looping over Ripley.

Substitute Jules brought the Grecians level 10 minutes later, firing the ball in from Ryan Woods’ corner, and the comeback was complete in the 79th minute as Harris smashed a volley beyond Ripley from Pedro Borges’ lovely flicked pass.

Alli tapped in from Ilmari Niskanen’s cross late on to add extra gloss to the scoreline.

Richie Wellens blamed his side’s lack of experience after his Leyton Orient side, who finished with 10 men, drew 2-2 with Exeter at Brisbane Road.

Orient were holding a comfortable two-goal lead with Ollie O’Neill and substitute George Moncur on the scoresheet.

But the context of the game changed when Brandon Cooper was forced off with injury during the second half leaving Orient, who had already used all their substitutes, to battle out the final 20 minutes a man down.

Orient were then penned in and around their own penalty area and the Grecians finally broke through a resilient rearguard action with a Millenic Alli header before Will Aimson got the final touch to Tommy Carroll’s shot to salvage a point.

“I thought it wasn’t a great game in terms of quality,” said Wellens.

“Both teams gave too many turnovers, especially us. When we go into a 2-0 lead and down to 10 men, it’s a problem. But it should only be a small problem and we just lacked experience.

“The schedule and the amount of extra time we’ve played is hard for everyone and I think every single club have lost a lot more players this season. For us, losing another two players to injury tonight was not ideal. We always wanted to give Dan Agyei half an hour but losing two players made us run the risk with substitutions.

“We’ve got certain players out of contract and some players are not improving, so we’ve got some decisions to make in the summer.

“The game tonight was comfortable for us but the injuries and the lack of bodies we had before tonight was severe. But it’s extreme now, we’ll have a patched-up team for Derby on Saturday.”

Exeter boss Gary Caldwell admitted it was a hard-earned point.

“We had to work extremely hard for the point to come back from behind,” he acknowledged.

“I thought the first half was fairly even. We started the game well but then Orient came back into it. I wanted a bit more intensity and I thought we got that second half.

“The two goals we gave away were extremely poor from our point of view and they didn’t create many chances outside of them.

“Late on I thought we created enough chances to win the game, so it was great fight and spirit from us to keep the unbeaten run going. It’s another point on the board but we wanted more so we now need to look at the remaining three games to see what we can take out of them.

“We put a lot of balls into their box and it was a backheel I think from our centre-half Will Aimson for the equaliser from a brilliant short corner, but at that moment we were creating lots of opportunities.

“But to be 2-0 down and come back, I’m delighted.”

Exeter scored twice in the final eight minutes to earn a point as Leyton Orient were forced to play out the final stages with 10 men due to Brandon Cooper’s injury.

Ollie O’Neill and George Moncur scored for the hosts but the Grecians salvaged a point through Millenic Alli and Tommy Carroll.

The deadlock was broken in the 36th minute by O’Neill, who scored direct from a corner on the left when his set-piece delivery eluded everyone in a crowded penalty area and found the far corner of the net.

The Os doubled their lead in the 64th minute when O’Neill intercepted an intended clearance and fed unmarked substitute Moncur, who slotted the ball home from close range.

After Orient, having used all five substitutes, were reduced to 10 men by the loss of Cooper, Exeter camped in and around the opposition penalty area and reduced the deficit when substitute Alli headed home on 88 minutes.

Four minutes later, a Carroll shot nestled in the back of the net from a deflection off an Orient player.