Arsenal deservedly led at half-time through Alexis Sanchez – scoring after having an earlier penalty saved by Rob Green – but Olivier Giroud’s sending off renewed hope of a Rangers comeback.
Those hopes were dampened when Tomas Rosicky doubled the Gunners lead, leaving Redknapp and co. frustrated at full-time as Charlie Austin’s late reply couldn’t ultimately lead to a leveller.
“Once they went down to 10 men, you’ve really got to make sure you keep it tight,” Redknapp told www.qpr.co.uk. “The one thing we didn’t want to do was concede another goal. To let the second goal in when we did was criminal.”
Having survived Sanchez’s early penalty following a foul by Armand Traore, Redknapp was frustrated with his side’s failure to learn from their defensive mistakes during a ‘sloppy’ first 45 minutes.
“We got away with the penalty,” he said. “There’s no need for Armand [Traore] to go to ground there.
“We got away with that but then we’ve fallen asleep at the back for their first goal. It was a criminal bit of defending.
Redknapp added: “Our passing was sloppy in the first half. We gave away the ball too often and when you give it away you invite attack after attack. When you’ve got possession you’ve got to keep the ball. We didn’t do that well enough in the first half.”
Austin’s goal – taking his tally to 12 for the season from the penalty spot – fuelled a late rally, as Rangers piled on the pressure in search of a second.
Redknapp was devastated to see his side denied another spot-kick when Bobby Zamora went to ground in stoppage time, adding: “When we got one back we had opportunities in the last 15 minutes and had a blatant penalty turned down.
“We got in some great positions but our final ball wasn’t good enough.
“We’re disappointed in the end. We really should have got something from it.”
There is little time for Rangers to dwell on disappointment, who remain two points above the drop zone following the day’s Premier League action.
With games against Crystal Palace and Swansea City to come at Loftus Road in the next seven days, Redknapp is keen to strengthen their position above the bottom three.
“Results today couldn’t really have gone any better for us,” he said.
“We’ve got two vital home games coming up and we need to pick up some points at home.”