Newcastle survived an FA Cup scare at Blackburn as they blew a two-goal lead before hitting back to win 4-2 after extra time in the third-round replay.
Rafael Benitez sent out an under-strength line-up featuring eight changes from Newcastle's 2-1 defeat at Chelsea in the Premier League on Saturday.
The stand-ins made a fast start on Tuesday when Sean Longstaff scored his first goal for Newcastle.
The 21-year-old found the net inside the first minute with a deflected strike from outside the penalty area.
Callum Roberts, handed his first Newcastle appearance since January 2015, doubled their lead in the 22nd minute with his first goal for the club.
But Blackburn pulled a goal back 12 minutes before half-time through former Newcastle forward Adam Armstrong.
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And Republic of Ireland international Darragh Lenihan equalised for Blackburn with a header in first-half stoppage time.
It took extra time to settle the tie, with Blackburn's Bradley Dack missing a golden chance before Joselu pounced to slot home in the 105th minute after Rovers goalkeeper David Raya spilled Fabian Schar's drive.
Blackburn complained in vain that Joselu was offside.
Ayoze Perez completed Newcastle's escape act moments later when he cut in from the right and fired home.
"We went 2-0 up and then Blackburn did well, but we reacted so I'm pleased with the effort and the commitment of the players. The young players did well," Benitez said.
Yet injuries to defenders Ciaran Clark and Jamaal Lascelles will cast a shadow over the win for Benitez.
"We need to wait tomorrow and see how they are, and if they cannot play then we will bring another one in," Benitez said.
Newcastle, who haven't won the FA Cup since 1955, host fellow Premier League club Watford in the fourth round.
- Wednesday book Chelsea clash -
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