It was a night of Fulham firsts at the New Den as Slavisa Jokanovic’s much-changed side cruised into the fourth round of the League Cup with a comprehensive win over Millwall. There were first Fulham goals for Joe Bryan, American youngster Luca de la Torre and Cyrus Christie – who scored a thirty-yard screamer with his wrong foot – as well as a first start for 15 year-old midfielder Harry Elliott, the latest teenage sensation off the Motspur Park conveyor belt.

There was also a welcome return for Tim Ream, who made his first start of the season after being sidelined by a troublesome back complaint as part of a reshaped defence. Jokanovic deployed the American defender, who was Fulham’s player of the season last term alongside two other central backs, in an innovative 3-4-3 system that gave Christie and Bryan license to roam forward from wing-back roles. It didn’t take long for Bryan, making his first appearance since being dropped following Fulham’s win over Burnley last month, to remind Jokanovic of his offensive qualities with a beautifully-taken opener.

De la Torre, who shone brightly throughout, found a pocket of space just outside the Millwall box and slipped a lovely ball into the area for the onrushing Bryan, who swept home a finish across Ben Amos and into the far corner from an acute angle. it was just the sort of attacking contribution that Jokanovic seeks from his full-backs and the type of goal that Bryan scored in this competition last year as Bristol City went on a remarkable run to the semi-finals.

The goal galvanised an experimental Fulham side, who could have put the contest to bed well before half-time. Floyd Ayite did well to retrieve a floated cross and tee up de la Torre, who was denied by a smart save from Amos. The midfielder was once again denied by the Millwall keeper later in the half. Then Kevin McDonald, making his hundredth appearance for the Whites, went close to repeating his feat of scoring a spectacular goal against Millwall, as he did last April. The Scottish international took aim from 20 yards and his powerful drive flashed inches wide of goal.

The energetic de la Torre and Bryan combined again just after the half hour to nearly double Fulham’s lead. The tricky Californian midfielder drove at the Millwall defence after seizing on a loose ball, committing a couple of Lions defenders before again freeing Bryan down the left flank. This time the marauding Fulham wing-back went for power and his shot flew high over the bar.

The visitors maintained a high tempo and their attacking intent after the break. After a frustrating first half, Aboubakar Kamara almost laid on a second goal just two minutes after the restart. The French forward fired an inviting cross all the way across for Christie, but the Irish international’s strike whizzed fractionally wide of goal. The Whites didn’t have to wait long to put a bit of clear water between themselves and their Championship opponents – with that crucial second goal coming five minutes later.

Following some patient keepball involving Andre-Frank Zambo Anguissa and Bryan, Ayite was afforded far too much space to gallop into down the left and he produced the perfect cut back for de la Torre to pick his spot when left unattended around the penalty spot. It was a memorable moment for the 20 year-old, whose mature display fully vindicated Jokanovic’s decision to offer opportunities to the younger members of the Fulham squad.

What seemed a straightforward success for the Whites was soon thrown into doubt when Millwall raised their level and pulled a goal back with half an hour to play. The home side were briefly enlivened by the lifeline provided when Tom Elliott forced home Shane Ferguson’s corner from a couple of yards out and began to put the Fulham defence under a sustained aerial bombardment.

But the visitors weathered the storm and made sure of a place in round four courtesy of a thunderbolt from the most unlikely of sources. Christie is hardly known for his goalscoring – not least off his left foot – but took advantage of the invitation to cut inside from the right and curl a majestic finish into the bottom corner from the best part of 25 yards. That meant that the intensity of the contest waned a little towards the end, allowing Harvey Elliott, who stepped off the bench just hours after sitting school tests to become the club’s youngest-ever player, to display a few classy touches in a promising cameo as the Whites sauntered through the closing stages.

MILLWALL (4-4-2): Amos; McLaughlin, Wallace, Cooper, Ferguson (Wallace 88); Karacan (Williams 74), Skalak (Romeo 45′), Tunnicliffe, O’Brien; Gregory, T. Elliott. Subs (not used): Martin, Webster, White, Morison.

GOAL: T. Elliott (61).

FULHAM (3-4-3): Rico; S. Sessegnon, Ream (Odoi 62), Le Marchand; Christie, Bryan, McDonald, Anguissa; Kamara, de la Torre (O’Riley 85), Ayite (Elliott 81). Subs (not used): Fabri, Chambers, Cisse, Mitrovic.

GOALS: Bryan (7), de la Torre (52), Christie (68).

REFEREE: Darren Bond (Lancashire).

ATTENDANCE: 5.839