With the signing of Diego Costa and the signing this week of Andrea Pirlo, the PTO era in Serie A has finally arrived.

The arrival of Pirlos new signing, Marco Materazzi, has created a more dangerous side with Pirli providing the attack, the attacking full-backs and the wide attackers.

The defense is the only question mark and will be the Achilles heel for the likes of Juventus, AC Milan and Roma.

But the most important question is whether or not the new arrival will have the necessary qualities to be a key cog in the system.

The list of players on PTO are not long, with Ponce de Leon, Gervinho, Graziano Pelle, Giorgio Chiellini, Andrea Pignata, Francesco Totti, Simone Zaza and Giorgia Stacchi.

The first team is also filled with a number of names, with Totti the most notable and he is currently a free agent, while Chiella, Zaza, Stacchino, Chiesa, Gagliardini and Pelle are also expected to leave the club this summer.

If this trend continues, we may not see the likes we have seen for the last few years for a long time. 

The list of names on PTA are not as long as the other PTO-compatible players, with only five players on the list and three of those are from the PTA era.

We can see a clear trend in the list with Potti, Chiello, Zazu and Chiesas moves. 

Potti has been in the Italian league for over two years, with the PTR-1, his most recent spell with Napoli.

He is not exactly a star, but he has had a good time, scoring seven goals in 17 games, and has had an incredible run for the Pertuscorei.

He has the qualities to play at a higher level than he has in the past, and will need to show that to stay in Italy.

His ability to play as a striker, as well as his ability to contribute offensively is something to be feared, and he could be an excellent signing for a team like Milan, or even Roma. 

Graziano is an important addition, as is Giorgino Pelle.

Pelle has been the mainstay of the Milan team for many years and has scored the goals that have helped Milan to the Scudetto.

The PTR’s first team could be a real strength in the league, as he will likely be one of the main contributors to the attack and can score. 

For Roma, they have a new signing who could have the potential to be their best player.

Giampaolo Gazzetta has scored five goals in seven games for the Giallorossi, and is one of only three players in Serie B who can play as the number 10, a position that is not normally taken by the Italian.

He can also score in the attacking third, and can also provide an outlet for the rest of the team when they need a goal. 

Totti and Chielli have both been linked with Milan, and both are currently free agents, but it is unclear whether or the former will leave the Giampiero. 

Materazzio has been a consistent performer for Milan, scoring in four of their last six league games, including four in a row.

With the return of Mario Balotelli to the team, Matera has been given a chance to play in the role that he used to play for the Nerazzurri, and in his most impressive performance he scored three goals in three games.

He was also involved in a late equalizer to help Milan beat Torino, and was also instrumental in helping the Rossoneri beat Udinese. 

Stefanie Gherardini is an interesting addition to the POTAs lineup.

Gherardi has scored two goals in two games this season, with his goals coming in a 3-0 win over Torino. 

If Milan are able to stay up this season and finish in the top four, it will have to rely on a very solid POTA side.

With Pirlou joining the team this summer, it is clear that the system is set up to help him thrive.