sentences:  During the next four years, the sweeper position was usually that of either Willi Schulz or Karl-Heinz Schnellinger and thus Sieloff did not gain anymore caps up to 1970.After the 1970 FIFA World Cup, with Willi Schulz retiring from international play and Karl-Heinz Schnellinger not featuring regularly in the German lineups due to playing abroad, Sieloff revived his international career, which was also fostered by his success at club level with Borussia Mönchengladbach.In 1969, Sieloff had made the change from VfB Stuttgart to Borussia Mönchengladbach.