"He made his debut in '91 I think it was in the qualifier and he didn't play a friendly for nine years I think until 2000 so good luck trying to get the players together!"
Ryan Giggs has officially been announced as the new manager of the Welsh national team following on from Chris Coleman's resignation after they failed to qualify for the 2018 World Cup is Russian Federation.
Giggs, 44, said: "I am so proud to have been given the honour of managing the national team".
"Sir Alex brought players to Manchester United who were intelligent, good characters and all of them have the potential to be managers", McClaren said.
Giggs was a rarity in football by spending his entire playing career at one club.
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The Football Association of Wales' technical director lost out on the job to Giggs, but he was an important member of Chris Coleman's backroom staff and tapping into his knowledge would appear essential.
"When you've got Champions League quarter-finals and you are asking the players to travel all around the world, it's about striking that balance".
When asked what he thought of Giggs being given the Wales job Shearer said with a cheeky smile: "It will be interesting how he gets the players to turn up".
But a new manager is due to be appointed before the Uefa Nations League draw takes place in Switzerland on January 24.
Coleman helped the Welsh national side qualify for the European Championship in 2016, where they reached the semi-final.
"We haven't been in a World Cup since 1958 and I want to do it".