Dean Keates believes Walsall were the architects of their own downfall at Pompey.
The Saddlers boss was frustrated with his side’s performance in their 2-0 loss against the Blues last night.
Oli Hawkins and Ronan Curtis were both on target as Kenny Jackett’s men retained a four-point lead at the top of League One.
Keates felt both of Pompey’s goals stemmed from mistakes made by the visitors.
And the Walsall manager admitted he will dip into the transfer market in January if things don’t improve.
He told the Express & Star: ‘We are frustrated with the goals we conceded.
‘I keep going on about learning and developing but it has got to start sinking in now.
‘Otherwise other players will have the opportunity to come in and play for this football club.
‘Portsmouth’s first goal arrived when – following a throw-in – the ball looped up and off George Dobson, with Hawkins then nodding in.
‘For their first goal, the second phase of it loops off George and lands on someone who is 6ft 4in at the back post.
‘With that you need a little bit of luck. But it’s the first phase. It’s a throw-in and we have not got tight enough.
‘They have not really had to work anything. Both goals have come from our mistakes again.’
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