Leeds United struggled to cope with West Brom’s attack at the weekend, shipping four goals at The Hawthorns.
West Brom beat Leeds 4-1 to prevent Marcelo Bielsa’s side from retaining their place at the top of the Championship.
And Stuart Dallas had a game to forget as he filled in for the injured Luke Ayling at right-back.
Dallas’ performance was an indicator of just how much Leeds have missed Ayling.
The Northern Ireland international is naturally a winger but he has been forced to adapt to a new role as a full-back in the absence of Ayling and Gaetano Berardi.
With Lewie Coyle out on loan until January, Leeds may have to get used to Dallas at right-back.
The 27-year-old was caught out of position for Hal Robson-Kanu’s opener, leaving Pontus Jansson exposed as the Welshman lashed home.
Dallas was once again caught napping for the third goal as Harvey Barnes strolled into the space and stretched West Brom’s lead.
And in the build-up to Dwight Gayle’s goal, which made it 4-0, West Brom charged down the left flank, where Dallas was nowhere to be seen.
While it is harsh to criticise him too much because he is not a defender, using Dallas as a right-back has ruthlessly exposed Leeds’ weakness.
His latest performance showed that he is the weak link in the back four and indicated how influential Ayling is.