Albert Riera broke the deadlock with a fantastic finish in the 25th minute as Liverpool dominated the first half, carving out several chances that went begging.
Teammates celebrates Reira goal
They were nearly made to rue those misses as Preston enjoyed a fine spell midway through the second period, with a Sean St Ledger goal disallowed and a confident penalty appeal turned down.
However, Rafa Benitez's side weathered the storm and held on for victory as substitute Fernando Torres, on his return from injury, scored in the dying seconds.
