Since Rakitić has performed brilliantly for Croatia in the World Cup thus far, it should be exciting to see how much of an effect this diet change truly has on his game when he suits up in a Barcelona jersey once again.
The hosts, the lowest-ranked team at the World Cup this year, were second in their group and beat former champions Spain in the last-16 round.
He earned 127 caps, scoring nine goals, and holds the record for the most global appearances by any Russian player.
Having dazzled its way through the group stages, Croatia was somewhat pedestrian in its two knockout games and needed penalty shootouts to overcome Denmark and Russian Federation.
England take on Croatia on Wednesday in Moscow in another match in which the shifting sands of tournament play now make it hard to pick a clear favourite. Sergio Goycochea (Argentina) and Harald Schumacher (Germany) are the other two keepers in that list. Sweden did the same against Romania in the 1994 quarter-final, where Kennet Andersson also equalised in the 115th minute, before going on to win on penalties.
Despite the pre-World Cup barbs and snipes regarding Russia's quality and the politically-charged commentary related to the hosts, they bowed out in style, having exceeded expectations and injected the tournament with a healthy dose of enthusiasm.
It is the first time England have reached that stage in this tournament since 1990, beyond memory for many younger fans.
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Dalic identified top-scorer Kane and Raheem Sterling as threats in a team with "no glaring weaknesses".
Croatia will now face England on Wednesday in Moscow and after two long and tiring games they will surely start as heavy-legged underdogs.
This might be Belgium's first appearance in a World Cup semifinal since 1986, but make no mistake, the Red Devils has earned its place in the last four.
That said, Suker, who helped Croatia reach the semi-finals of the 1998 World Cup, has credited the Three Lions for their improvement this summer. As of now, only five World Cups have produced more goals in the knockout stages, with Switzerland (1954) and United States (1994) both producing 44 goals each.
"We do not want to stop, we will try to play our best game [against England]".
A lot has happened in the last three weeks but it's hard to believe we've nearly reached the end.
As Croatia's winning penalty was scored, there was a stunned silence.