Liverpool are used to facing fearsome opposition on the pitch.
The Premier League high-flyers have been in sensational form this season and they're generally used to dominating teams.
However, they had something of a shock this week when players and staff from the New Zealand rugby league team popped in and performed their legendary Haka at the Melwood canteen.
The Kiwis are playing England in the second test at Anfield this weekend, looking to level the three-match series. On Saturday at Hull's KCOM Stadium, England just edged an incredibly close first test - winning 18-16.
The highlight of the game was a stunning try from 22-year-old debutant Wigan centre Oliver Gildart which swung the game in favour of the home side.
New Zealand cannot be discounted in this series. They boast a host of world-class players and recently beat the world's best international team, Australia. With the likes of Shaun Johnson, the Kiwis will be confident in Liverpool and will take inspiration from playing at one of the world's most famous stadiums.
Under the leadership of Australian coach Wayne Bennett, England have again emerged as a major force in the world game and last year they were agonisingly beaten by Australia in the World Cup Final, 6-0.
The Kiwis clearly enjoyed their visit to Liverpool and their coach Michael Maguire presented Jurgen Klopp with a New Zealand shirt. Liverpool players captured the haka on their phones and posed for selfies with the New Zealand players.
The third and final test will be played in Leeds.
The Haka is always special to witness...especially in the canteen at Melwood!
@NZRL_Kiwis called into the Reds' base for a warm-up session ahead of Sunday's match against @England_RL at Anfield:
