Rafael Benitez has already created a lot of history during his managerial career, and is continuing that at Newcastle United.
The Spaniard has won ten major trophies as a manager, including Liverpool's famous Champions League success in 2005, as well as La Liga twice with Valencia before he moved to Anfield.
He has also won the Uefa Cup/Europa League twice, firstly during his tenure at the Mestalla, before guiding Chelsea to the trophy during his brief stint there in 2013.
Having been sacked by Real Madrid in late 2015, Benitez was drafted in by Newcastle to save them from relegation.
However, the damage had already been done and the Magpies were relegated, but Benitez stabilised the club and won the Championship at the first time of asking to ensure an immediate return to the Premier League.
Newcastle started the season in fine fashion, and were in the top four after their 2-1 win over Stoke in week five.
Since then, there has been a marked slump though, and one win in their last six has seen them drop to 11th in the table.
If Benitez can avert the slump at Manchester United tomorrow, though, he will create a piece of history.
Should the Magpies win at Old Trafford, Benitez will become the first manager to win at United's ground with three different clubs.
The Spaniard has won there with Liverpool, a famous 4-1 win in 2009 as the two were embroiled in a title race, and with Chelsea, when the Blues won 1-0 thanks to Juan Mata's strike, after the Red Devils had already won the league.
The record is currently shared between the former Napoli boss and Martin O'Neill, who inspired Leicester City and Aston Villa to 1-0 wins at Old Trafford, with Tony Cottee and Gabby Agbonlahor getting the goals.
It would be a sweet achievement for Benitez, particularly due to his long-running rivalry with Jose Mourinho, which started when the pair took over at Liverpool and Chelsea respectively.
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