As Euro 2012 draws toward its dramatic conclusion, Europe's footballing powerhouses should take note of the mistakes made by Arsenal and Valencia and avoid letting a player's performances in June influence them in the following season's transfer market.
It's a common mistake that is repeated every two years as teams from Serie A, La Liga, the Premier League and the Bundesliga flock to snap up the summer's hottest players who have used the big international stage to showcase their talents.
But the summer's success stories can often end up becoming the biggest flops as players fail to adapt to new leagues and live up to expectation as Arsenal and Valencia have found out at great cost.
Euro 2008 was Arshavin's playground despite the Russian midfielder missing the first two group games of the competition through suspension.
When he returned, the winger both created and scored a goal in each of his first two appearances against Sweden and the Netherlands, before his side were knocked-out in a semi-final showdown by eventual winners Spain.
His performances lead to him being selected in the tournaments Best XI, but his appearances the following season in an Arsenal shirt, after his move from Zenit in January 2009, were beyond sub-par.
Aside from a stunning performance on April 8th 2009 against Liverpool, during which the Russian scored all four of the Gunners goals in a 4-4 draw away at Anfield, Andrei frustrated fans at the Emirates with lazy performances and an inability to adapt to the English game.
Zlatko Zahovic was a Slovenian striker who took the spotlight in Euro 2000. His three goals in three games raised a number of eyebrows and eventually lead to a big move to Spanish power house Valencia.
The midfielder was part of the Champions League final runner-up side that lost to Bayern Munich in the final on penalties. Zahovic missed his penalty that night in the San Siro and scored just three goals in his 20 disappointing appearances during the 2000/01 season.
He also clashed badly with coach Hector Cuper and was eventually shipped out from the Mestalla in the summer of 2001 to Benfica.
Alan Dzagoev and Theodor Gebre Selassie may have impressed scouts with their performances through Euro 2012, but potential buyers should be wary of post-tournament price increases and there is the possibility that these players, who work well with their international compatriots, won't work in a new team and new league in new surroundings.
Sides such as AC Milan, Manchester City and Malaga should take note of these transfer blunders and think twice before rushing out to buy the next Euro "star."