KARL Robinson is planning to recruit from the free agent market in a bid to strengthen his Oxford United squad.

A 2-0 defeat at Peterborough United was the side's fourth in defeat in five games, sending them bottom of the Sky Bet League One table.

Yesterday they were only able to make one signing, winger Olamide Shodipo on loan from QPR.

It took the U's to their full complement of senior players under the squad cap rules - and with the players Robinson is looking at over 21 it would mean they would have to lose members of their current squad.

They can still be loaned out to non-league clubs, or just not be registered when the cut-off date comes next week.

Robinson said: "I think we're lacking in some really key areas.

"I'm watching aspects of certain things that I know aren't good enough, it's that simple."

He added: "There are still players available I want to sign and I'd like to get them done.

"These are things you can improve your squad with.

"There are different things you can still do, but I can't keep going losing games without doing something.

"That's not acceptable."

On the game itself, the U's boss said: "I thought we were very good in the last 25 minutes of the first half, it's just we can't seem to score at the moment.

"I don't know what's going on and then a lapse in concentration and all of a sudden I'm sat down there bewildered by a goal, thinking 'where did that come from?'

"Weirdly their two goals came when we were most in control.

"I thought we were exceptional in the first 20 minutes of the second half.

"We got in some great areas and didn't take the chances, against a good team.

"Then Kells under-hits a pass to Longy, then they break and all of a sudden you're trying to climb a mountain."