Nasser El Khayati scored the winning penalty for Queens Park Rangers as they beat Swindon 4-2 in a shoot-out.
Nasser El Khayati (L) secured the win for QPR
Swindon's James Brophy equalised in the 107th minute and the scoreline stayed tied at 2-2 when 120 minutes were up.
Anton Rodgers missed the first penalty of the shootout for the Robins, and after Conor Thomas and Jordan Stewart had converted from the spot for the away side, Bradley Barry had his penalty saved by QPR goalkeeper Matt Ingram, giving El Khayati the chance to seal victory for the home team.
Chery and Polter both scored their spot kicks for the Hoops
The Rs did not miss any of their penalties, with Tjaronn Chery, Sebastian Polter and Washington also hitting the back of the net.
Fans were quick to toast the victory on Twitter, hot on the heels of Sunday's 3-0 win over Leeds, and you can read a selection of their tweets below:
5 different goalscorers, 4 debuts, 3 youth team appearances, 2 games (league win, cup win), 1 Jimmy Floyd Hasselbaink #QPR— Mr QPR (@QPRforum) August 10, 2016
Many fans were in disbelief that they had watched their side win a cup game at all. Last season, QPR lost in the second round of the League Cup to League Two side Carlisle United.
3 hours Kip. Yesterday was a long day but worth it. I saw QPR win a cup game on a penalty shoot out. ⚽️— Warren (@SobrietyRanger) August 11, 2016
A ugly win but I'm just surprised we won a cup game! Happy to see yeni score on debut and Washington to get one! Hopefully more to come #QPR— James ⚽️ (@qprjamesqpr) August 11, 2016
I will tell my children how I saw QPR win a cup game live yes that's right the first round #qpr— Harry perkins (@ClinicalChery) August 10, 2016
Had this weird dream we won a cup game last night...was right weird #qpr— warrendell (@warrendell) August 11, 2016
On reflection whilst we know the boys can play better it as a very entertaining night and we won a cup game!Roll on Cardiff in Sunday. #QPR— Nic Oughton (@nicoughton) August 11, 2016
League Cup draw has been delayed because they are searching for QPR's draw ball as we never normally make it this far in any cup! #QPR— #KarlosHenry (@QPRJOE) August 10, 2016
Others focused on Washington's first goal for the club. Having signed from Peterborough in January, the 24-year-old striker had gone 11 games for the club without troubling the scorers.
Conor Washington ended a run of 13 hours and 5 minutes without a competitive goal for QPR. #QPR— Jack Supple (@Jack_Supple) August 11, 2016
Washington in action for Northern Ireland
Not everyone was quite so happy about the result, with some choosing to focus upon the Rs' failure to beat a team from the tier below in normal time.
The draw for the second round took place immediately after last night's encounters, and QPR have been drawn against another League One side in the shape of Rochdale. The match will take place on 23 August at Loftus Road.
QPR manager Jimmy Floyd Hasselbaink will be keen for his charges to maintain their winning start
In the meantime, QPR continue their Championship campaign with a trip to Cardiff City on Sunday and they will be looking to extend their 100% win record this season.