Marcelo Bielsa' s Whites fell behind in the 71st minute as Connor McBride's free-kick deflected past 'keeper Illan Meslier but Pascal Struijk slotted home a deflected equaliser nine minutes from time.
Summer signing from Barcelona Junior Firpo was handed his Whites debut and Lee Sobot hands out the scores from the displays at Ewood Park.
United are back in action on Friday night at Fleetwood Town, after which Leeds will take on Firpo's former side Real Betis at Loughborough University on Saturday lunch time.
The Whites then play Ajax in Amsterdam next Wednesday ahead of the new Premier League season which will begin with a clash against arch rivals Manchester United on Saturday, August 14.
United are back in action on Friday night at Fleetwood Town, after which Leeds will take on Firpo's former side Real Betis at Loughborough University on Saturday lunch time.
![6 - Brought on at the break for Llorente and took his place alongside Struijk at centre-back. Made an early stray pass but soon recovered and dug deep in the monsoon conditions. Photo by Lewis Storey/Getty Images.](https://www.portsmouth.co.uk/webimg/QVNIMTIxNzQ0ODQ0.jpg?crop=3:2&trim=&width=800)
13. Luke Ayling (sub)
6 - Brought on at the break for Llorente and took his place alongside Struijk at centre-back. Made an early stray pass but soon recovered and dug deep in the monsoon conditions. Photo by Lewis Storey/Getty Images.
![6 - Another of those to come on in the 61st minute along with Sam Greenwood and the duo paired up through the middle upfront. Quickly got involved. Put an overhead kick wide and produced a strong sliding tackle in the last minute. Picture by Richard Sellers/PA Wire.](https://www.portsmouth.co.uk/webimg/QVNIMTIxNzQ0ODQ1.jpg?crop=3:2&trim=&width=800)
14. Tyler Roberts (sub)
6 - Another of those to come on in the 61st minute along with Sam Greenwood and the duo paired up through the middle upfront. Quickly got involved. Put an overhead kick wide and produced a strong sliding tackle in the last minute. Picture by Richard Sellers/PA Wire.
![6 - A busy couple of days for the 19-year-old forward who played the full duration of Tuesday's clash at Guiseley. Certainly didn't look out of place and evidently very prominent in Bielsa's thoughts. Can be a 10 or a 9. Picture by Richard Sellers/PA Wire.](https://www.portsmouth.co.uk/webimg/QVNIMTIxNzQ0ODQ2.jpg?crop=3:2&trim=&width=800)
15. Sam Greenwood (sub)
6 - A busy couple of days for the 19-year-old forward who played the full duration of Tuesday's clash at Guiseley. Certainly didn't look out of place and evidently very prominent in Bielsa's thoughts. Can be a 10 or a 9. Picture by Richard Sellers/PA Wire.