Tony Pulis enjoyed victory over former club West Brom as Daniel Ayala's 91st-minute strike clinched three points for Middlesbrough.
A controversial late goal from Daniel Ayala moved Middlesbrough back to the top of the Championship as Tony Pulis' men defeated his former club West Brom 1-0 at the Riverside Stadium.
Boro needed only a point to reclaim top spot from Leeds United and looked on course for merely that until Ayala's last-gasp intervention to secure a fourth straight win.
The Teessiders had been on top throughout, yet struggled to really test Sam Johnstone, who made only routine stops either side of a glaring Martin Braithwaite miss.