Liverpool's plan suffered an early blow after only four minutes as a mistake by Brad Jones saw Gabriel Tamas open the scoring for West Brom and Liverpool were on the back foot.
Romelu Lukaku nearly made it 2-0 but saw his shot denied by a well timed interception by Jamie Carragher and a couple of minutes later he set up Rosenberg who saw his shot well saved by Jones.
Liverpool had a great chance to equalise as Assaidi flew down the left and curled towards the near post but as Yesil arrived he was unable to guide the ball in.
The equaliser did come on 17 minutes as Downing spotted Wisdom out on the right and the full back put in Sahin who let fly from 30 yards out, the shot troubled Foster in the home goal and smashed in.
With halftime approaching, Liverpool started a break as Assaidi fed Yesil who looked to have been clipped as he went to break through the West Brom defence but stayed on his feet and was sadly dispossessed by Jonas Olsson.
After the interval, Liverpool continued where they had left off with Pacheco and Yesil exchanging passes just outside the area but as the Spaniard went to shoot, the ball was intercepted.
Both sides pressed for a winner but it was Liverpool who again had a great chance as Yesil's close range shot crept over the crossbar and it seemed like the away side would be the next to score as Sahin dominated the possession in the middle and the attacks became more expansive.
Pacheco came close twice with the first coming after beating his marker to loop a shot over Foster which pinged onto the cross bar and his second chance saw him fire low at Foster with the keeper pushing away the goal-bound shot.
In the 80th minute, Liverpool wrote a new piece of history as 16-year-old Jerome Sinclair came on to become the youngest-ever Liverpool player to play for the 'senior' team when he replaced Yesil while Pacheco departed for Suso.
Suso made an instant impact as he ran at the West Brom defence with confidence before sliding a pass to Assaidi who then squared the ball to the back post for Sahin to tap in and secure a brace and surely the passage into the fourth round for Liverpool.
The final whistle went and Liverpool secured their first domestic win of the season and a place in the fourth round in which they were drawn at home to Swansea, a reunion for manager Brendan Rodgers in October on the cards.
|Other results in round three|