Barcelona's options for Ter Stegen's replacement

The Dutch goalkeeper has decided that he wants to leave Barça because of the lack of opportunities and minutes in the team. However, the club will only let him out for a large amount of money. 

Meanwhile, Ter Stegen needs a substitute that he can trust so that Valverde's team faces ten very hard and demanding months of competition. Therefore, the option of Iñaki Peña has not yet been confirmed, as Barcelona are still thinking of signing a better and more experienced player. 

And these are Yann Sommer and Koen Casteels, as 'Mundo Deportivo' points out. The first one is usually in the starting line-up of Borussia Monchengladbach, in addition to in the Swiss national team. 

The second, 26, also plays in the Bundesliga, specifically in Wolfsburg. He is Belgian and has a greater projection than the Swiss. Barcelona are planning ahead.