As well as making almost 70 league appearances for the Belgians, Alcaraz has played in 16 European games.
The signing was Wigan's first of the summer and will be seen as a shrewd addition to the squad after they ended the Premier League season only two places above the relegation zone and with a goal difference of minus 42.
They were thrashed 8-0 by Chelsea on the last day of the season, having earlier in the campaign conceded nine goals at Tottenham and twice suffered a 5-0 defeat by Manchester United.
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