Robinson was at fault for Reading's opener at White Hart Lane when he failed to deal with Stephen Hunt's speculative free-kick from around 40 yards, with momentum taking him backwards.
Dimitar Berbatov levelled almost immediately and put Spurs ahead from the penalty spot just after the break - but Robinson palmed Leroy Lita's shot in the path of Hunt to earn Steve Coppell's men a replay in the FA Cup third-round clash.
Fabio Capello starts as England boss next week and has to decide on who his first-choice goalkeeper is, with Scott Carson and Robert Green putting their cases forward.
Although Robinson has been guilty of high-profile errors, he has also shown glimpses of a return to form, which Ramos believes Capello will take note of.
"It's up to Capello to say what he feels," said Ramos. "I don't think he is going to judge any player on one game, he's going to look at his characteristics overall.
"It's the team that lets in goals. Sometimes it's the responsibility of one player or another but at the end of the day the team concedes the goal.
"We've got a squad of 20-odd players and we have to look at them all and how they play.
"Some have good games, others not so good - we have to look at solutions to produce the best performance we can."
Robbie Keane missed an open goal early on and he was made to rue the miss when Robinson failed to deal with Hunt's free-kick after 25 minutes, although replays could not confirm if the ball crossed the line.
Berbatov crashed in the leveller off the post and crossbar, then Jermaine Jenas missed one-on-ones to take the lead.
Keane earned a penalty early in the second half but did not take it after missing his last two spot-kicks, so Berbatov converted.
Then came Hunt's equaliser 12 minutes from full-time, with Tom Huddlestone dismissed for a headbutt on Bobby Convey.
Reading boss Coppell fielded a weakened starting XI but was impressed with the work of his reserves.
"I've got 20-odd pros that I consider part of the first-team squad," he said.
"At any one time I could be called upon to use them - and every team in the Premier League uses more than 20 players in a season.
"I need to know that they are up to speed and ready to go. They showed that today.
"We got some lucky breaks but when we got a handle on the way we were playing, we made it difficult for them. It was never going to be easy for them.
"I thought we'd get a chance to snatch it and we got some good crosses in.
"But they are good players and for us to come back, they showed me in the best possible way - not through articles in the newspapers - that they have a commitment and want to play a full part in the season."