Purchase (right) and Hunter won Olympic gold in Beijing in 2008
Sir Steve Redgrave believes world and Olympic champions Zac Purchase and Mark Hunter can recover their form in the two remaining World Cup regattas.
The lightweight double sculls crew were outside the medals on the opening weekend of the series in Munich.
Redgrave told the BBC: "We expect them to be in the medals if not winning.
"When they came out last year they won the first race comfortably. They then went to Lucerne and finished fourth but still won the World Championships."
Crews from Germany, France and Denmark beat then in Munich but Purchase also refused to panic.
"We were always prepared to go out and race quickly," he said.
"We put together something that was quite good for us for where we are at the moment. We've done some good fitness work, and that speed is still to come.
Hunter added: "It's the start of the season. The World Championships in New Zealand last year were at the end of the season.
"We've showed we can win when it matters, so we're going to go back and work hard and I'm looking forward to the second World Cup regatta in Hamburg already."
Purchase and Hunter head to the second World Cup Regatta event later this month before the final stage in Lucerne in Switzerland over 8-10 July.
The 2011 World Championships are being held at Bled in Slovenia at the end of August.