Alonso has brought in four new coaches - all Spanish and previous colleagues of the former midfielder - with Alberto Encinas, Beñat Labaien, Luis Llopis and Miguel Muñoz making a summer move to London.
However, alongside bolstering his playing squad, Alonso wants more Premier League experience on his bench and Aston Villa set-piece coach Austin MacPhee is on his radar.
The growth in popularity for both specialised coaches - and goals scored from set pieces - means MacPhee is in demand and Chelsea will need to pay a compensation fee to secure his arrival.
46-year-old MacPhee has combined Villa role with a similar position in the Portugal national team since 2021.
Villa scored more goals from set pieces than any other team in Europe's top five leagues in the 2023/24 season.
They landed in the top five in 2024/25 and finished joint-top with Arsenal in the Premier League last season.