The phrase "last matchday" refers to the final day of a sports competition, typically in a league format, where all the teams play their last games of the season. It determines the final rankings and outcomes of the competition. Full definition
We messed up a chance to go top last matchday and today, we made it worse. (justarsenal.com)
Sergej Milinkovic - Savic 5.5: After netting Lazio's matchwinner last matchday, the Serbian youngster put in a decent performance but, like his teammates, was not creative enough to pose a major threat to the Roman backline. (italianfootballdaily.com)
Cuz if i remember vividly, we wanted so much for a mancity slump to take place in the Last matchday...... only for us to goahead and draw with the spuds! (justarsenal.com)