Before that, Andre will compete in the Club World Cup in December, with Fluminense having won the Copa Libertadores.
But he's then expected to be on the move.
Liverpool have already had a EUR30m (PS26m) offer turned down, as Fluminense didn't want to sell mid-season, and Andre was happy to stay to compete in the Copa Libertadores.
But that delay has allowed Arsenal to enter the race, sending scouts to watch him play in their game on Saturday.
Arsenal technical director Edu Gaspar spent time in Brazil over the international break, and he reportedly visited a number of clubs including Fluminense.
The 22-year-old plays a defensive role for his current side, and he's no stranger to foul play, picking up four suspensions this year alone - one for a straight red card, one for a second yellow, and two for accumulations of yellow cards.
Latest Arsenal injury updates and news.