Scunthorpe United booked their place in the National League play-off semi-finals with a narrow victory over Southend United at the Attis Arena. Callum Roberts' fifth-minute strike was all that separated the rivals, who finished the regular season only one point apart in the table. Daniel Whitehall secured possession in Southend's half and supplied Roberts, whose left-footed shot found the bottom corner after he had dashed into the area. Roberts' 20th goal of the season was enough to set up a semi-final appointment with Rochdale on Sunday. And Scunthorpe's win was sealed despite Southend's efforts to equalize. But Southend's campaign ended with Harry Taylor being sent off for a second bookable offence eight minutes into injury time. The win was a significant one for Scunthorpe, who will now face Rochdale in the semi-finals. Scunthorpe's manager will be pleased with the result, which was achieved through a combination of good teamwork and individual skill. The club's fans will be looking forward to the semi-final match, which will be played on Sunday. So, Scunthorpe United will now focus on preparing for the semi-finals, where they will face a tough opponent in Rochdale.