Matteo Berrettini became the first Italian man to reach the Australian Open semi-finals after outlasting Gael Monfils on Tuesday.

Berrettini had appeared to be on course for a dominant victory, and although Monfils fought back to make it tough, the 25-year-old got the job done 6-4 6-4 3-6 3-6 6-2 in a gruelling encounter.

Monfils had an uphill struggle amid a sloppy start, with Berrettini breaking to love in the fifth game as the Frenchman committed two unforced errors and a double fault.

That proved to be the only opportunity Berrettini needed, and he subsequently had few issues seeing out the set from there, though Monfils initially appeared sharper early in the second.

An astonishing fourth game then left Monfils looking dejected as Berrettini somehow survived 10 deuces to hold serve after almost 20 minutes – the 25 points played here were almost half the first-set total (55).

Berrettini sensed the mood and went for the kill, losing just two points on serve before going on to close out the set to love.

A reaction did come, however. Monfils finally got his first break of serve as Berrettini's first double fault gifted him a lifeline, the 35-year-old then easing through the rest of the third set.

He kept that up in the fourth as well, with two huge forehand winners helping Monfils go a break up to take charge before ultimately levelling the match, but Berrettini had too much in the decider as he broke in the first game.

Berrettini raced into a 4-0 lead and, although Monfils did pull a couple of games back, the Italian was out of sight and clinched a deserved victory that saw him grab a slice of history.

DATA SLAM: Berrettini holds his nerve at the crucial moment

Having lost the previous two sets heading into the decider, it could have been very tempting for Berrettini to completely change up his game, but he remained very focused on accuracy and essentially letting Monfils shoot himself in the foot.

Berrettini made no double faults and just four unforced errors in the final set, compared to Monfils' combined total of 11, 10 of which came during rallies. The Italian won 80 per cent of his points on serve in the fifth and that mentality was crucial in outlasting his opponent.

WINNERS/UNFORCED ERRORS

Berrettini – 51/50

Monfils – 48/51

ACES/DOUBLE FAULTS

Berrettini – 12/2

Monfils – 15/7

BREAK POINTS WON

Berrettini – 4/11

Monfils – 3/14