Keane's Ireland vow

Double salvo ... Republic of Ireland striker Robbie Keane celebrates one of his two goals (Getty)

Robbie Keane insists the Republic of Ireland can bounce back from its poor showing in Kazakhstan by beating Germany in its next World Cup qualifier.

The Republic put on arguably its worst performance of Giovanni Trapattoni's reign on Saturday morning (AEST) when it edged to an undeserved 2-1 win over eastern European minnows Kazakhstan.

The former Soviet Republic, ranked 116 places below Trapattoni's side, took the lead through captain Kairat Nurdauletov and missed a couple of good chances before Keane and Kevin Doyle rescued the visitor with two goals in the last two minutes.

Next up for Trapattoni's men after Wednesday morning's (AEST) friendly against Oman is a World Cup qualifier against Germany on October 12 in Dublin.

Keane admits his team must up its game if it is to beat the Germans, but the Republic skipper insists victory over the Group C favourite is not beyond the men in green.

"We're always confident of winning against anyone at home, regardless of who they are," Keane said.

"Germany are the favourites and are probably a better team than we are but if we give it everything we can get the win.

"It will be a completely different game. Germany will want to come out and try to win the game whereas Kazakhstan sat back and defended as one.

"We will be at home in front of our fans as well so it will be a good opportunity for us."

The pressure on Trapattoni would have intensified to a new level had it not been for Keane and Doyle's last-gasp strikes.

The 73-year-old Italian came under fire for leading the Republic through a dreadful Euro 2012 campaign and his man-management skills have since been put under scrutiny following Darron Gibson's refusal to play and James McClean's strongly-worded tweet, which appeared to be directed at Trapattoni.

Having endured a long trip across half the planet to get to Astana, the Los Angeles Galaxy striker Keane is just happy to have snatched the win despite all the controversy engulfing the squad.

The former Tottenham man now hopes the team can build on the victory and once again prove the doubters wrong.

"It wasn't a good performance but at the end of the day it doesn't matter. We have three points on the board," Keane added.

"We had the same situation last time around when we played Armenia (during Euro 2012 qualification).

"We won the game and people said it wasn't a good performance. It wasn't, and I think it's going to be the same for us with what happened in Kazakhstan.

"Kazakhstan is going to be a tough place for teams to come - to play in those conditions on that Astroturf pitch after such a big flight and time difference, I'm sure teams will find it hard here."

McClean put his international future in jeopardy by venting his anger at being omitted from the side on Twitter.

He wrote: "delighted as a fan we got the win. Personal level #fuming #f*****joke #embarrassing'."

It was removed from Twitter shortly after, but Trapattoni is aware of the rant and may now kick the Sunderland winger out of the squad for the friendly against Oman at Craven Cottage.

He later tweeted: "i apologise for my tweet last night, it was stupid, disrespectful and i let my frustration get the better of me which still aint an excuse."

Teammate Kevin Doyle has rubbished claims of disharmony within the Republic of Ireland squad, insisting that all the players remain firmly behind manager Trapattoni.

Earlier this summer Kevin Foley also refused a call-up to the squad for the Serbia friendly and vowed never to play for Trapattoni again after being overlooked for Euro 2012.

Doyle, however, insists everyone in the party is fully behind their manager.

"Everyone respects the manager and there is no other scenario," Doyle said after scoring last night's winner in the 89th minute.

"The atmosphere is the same here as it has been in any Republic squad I've been involved in.

"Everyone is entitled to their opinion, but as far as I can see everyone is right behind the manager and hopefully that win will help ease the pressure on us."

Trapattoni is expected to make many changes to his side, with the likes of Stephen Kelly, David Meyler and Andy Keogh set to be given a chance to stake a claim for a place in the team to face Germany.