Nadal made it seven wins out of seven against John Isner in his China Open quarter-final match, winning it 6-4, 7-6.
He has also beaten Lucas Pouille and Karen Khachanov along the way as he remains on course to win his first China Open title since 2005.
Dimitrov meanwhile has had a much tougher route to the semi-finals, going the distance against Damir Dzumhur in the opening round.
He was then tasked with beating Juan Martin del Potro, who lost to Nadal in the semi-finals of this year’s US Open, and prevailed by just getting over the line with a tight 7-6, 7-5 victory.
And it was more of the same as it took three sets of action to dump Roberto Bautista-Agut out to set up his semi-final match with Nadal.
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The Spaniard will be going into this the fresher man as he looks to add the Beijing title to his five ATP title this year, which include the French Open and US Open.
He will also be bidding to ensure he finishes the season as world No 1.
Here is how you can keep up with the action.
When does Rafael Nadal face Grigor Dimitrov?
The match is scheduled as second on the main court – the National Tennis Stadium – today.
Play is scheduled to begin at 9.30am BST, 4.30pm local time.
The pair have met on nine occasions previously, with Nadal coming out on top eight times – losing just once.
Nadal and Dimitrov last met at the Australian Open semi-finals where the Spaniard beat the Bulgarian 6-3, 5-7, 7-6, 6-7, 6-4.
How to watch Rafael Nadal vs Grigor Dimitrov
The China Open is being broadcast by BT Sport and Sky Sports in the UK.
Between Monday and Friday the tournament is broadcast on BT Sport 1 (Sky 413) from 5.30am each day.
On Saturday and Sunday that changes to BT Sport 2 (Sky 414) from 7.30am and 7am respectively.
It is also being shown on Sky Sports Action and Sky’s Main Event channel.
Sky’s coverage begins at 5.30am on Wednesday and runs on the Main Event channel as well as Sky Sports Action.
Watch the China Open live online
You can live stream the China Open online if you are a BT Sport subscriber.
BT Sport will also be showing the China Open on desktop computers or laptops via the company’s own site.
The BT Sport website, is available to download now on iOS, Android and Windows 10 devices, provided you have a BT ID.
Unfortunately you are unable to beam BT Sport content from your device to a TV via a Google Chromecast, unless you’re also a BT broadband customer.
The BT Sport enhanced video player is also available online.
Sky TV and Virgin Media customers can also tune into BT Sport 1, via channel 413 and 531 respectively. The BT channel number is 408.
If you are a Sky customer all the action can be followed on your desktop or laptop via the Sky Go app, which if you’re an existing customer, is also available on iOS and Android smartphone and tablet devices.
Sky Go is also available on a number of platforms including Amazon Fire devices, iPad, Mac computers and laptops, Playstation 3, PS4 and Xbox One.
The Sky Sports app, available to download on iOS and Android devices, will also be providing live text coverage and updates.